Version 3.9.1
April 11th, 2026

- GSX (all versions) NEW: Push-in Towing service. A towbarless tug can tow your aircraft from the taxiway to the gate at high speed, with automatic route selection along taxiway paths. Available from the service selection menu that appears after choosing a parking position during taxi.

- GSX (all versions) NEW: Gate-to-Gate Towing. When already parked at a gate, Push-in can push you out using the existing pushback route, then tow you to the new gate. The tug automatically selects the best pushback direction based on the destination.

- GSX (all versions) NEW: Back navigation across all GSX menus. Menus now show a Back option (as the last entry) when navigated to from another menu, allowing you to return without closing and reopening.

- GSX Pro NEW: Seated Passengers support for PMDG 737-700 Passengers version in MSFS 2024.

- GSX (all versions) NEW: Pushback speed is now adjustable via a slider in the Simulation settings tab.

- GSX (all versions) NEW: Handler Script Editor: code folding with Notepad++-style +/- markers in the fold margin. Click the margin or press Ctrl+/ to collapse or expand a block.

- GSX (all versions) NEW: Handler scripts: new transmitKeyEvent(eventName, value=0) function fires SimConnect client events through the native MSFS 2024 transmit path, the same way GSX does internally.

- GSX (all versions) Change: The "Revoke parking services" entry in the Change menu (labelled "Revoke FollowMe and parking services" when FollowMe is active) now requires a Yes/No confirmation to prevent accidental activation.

- GSX (all versions) Change: The bypass pin is now tracked jitter-free during pushback, computed directly from aircraft position instead of reading back from SimConnect.

- GSX (all versions) Fix: Additional MARS data isolation fixes: pushback settings, stop positions and other mutable properties could still leak between sub-positions in certain editing scenarios.

- GSX (all versions) Fix: MARS parking position changes made in the 3D editor were not being saved.

- GSX (all versions) Fix: Error spam in the log when repositioning to a runway, caused by missing MARS attributes on runway objects.

- GSX (all versions) Fix: SimBrief data fetch now uses a 15-second timeout and only falls back to userid-based lookup on explicit reload.

- GSX (all versions) Fix: Crash when selecting an undefined door slot in the aircraft 3D editor.

- GSX (all versions) Fix: Crash when warping to a parking at an airport that has been unloaded by the simulator.

- GSX (all versions) Fix: Vehicle path spikes at transitions from long straights into turns, caused by incorrect heading on deferred bend points.

- GSX (all versions) Fix: Crash in baggage loader when the gate is a de-ice area.

- GSX (all versions) Fix: Marshaller "Please cut engines" message could appear when engines were already off.

- GSX (all versions) Fix: Cargo loading progress LVar could prematurely report 100% when the rear loader finished before the front loader materialized, causing progress tracking to stop while the front loader was still active.

- GSX (all versions) Fix: Services waiting for a door to reach the desired state now retry the toggle event at the same interval as the "Waiting for your action" warning (default 10s), instead of waiting forever if the aircraft ignored the first event.

- GSX (all versions) Fix: PMDG 737-700 variant detection in MSFS 2024 — the 737-700 Passenger version was misrouted to the 737-800 profile, causing incorrect FANS2 CDU detection, wrong passenger count, and wrong seat data.

- GSX (all versions) Fix: Random crashes that could occur during boarding or deboarding, caused by stale references to ground service vehicle animations.

- GSX P3D Fix: Crash in pushback detach phase when SimConnect returns incomplete data for altitude-above-ground.'

 

Source

Edited April 26Apr 26 by Ray Proudfoot
Title modified to make it generic.

On 4/11/2026 at 12:20 PM, MrLamb said:

- GSX (all versions) NEW: Push-in Towing service. A towbarless tug can tow your aircraft from the taxiway to the gate at high speed, with automatic route selection along taxiway paths. 

With this update, can you now pushback correctly to park at airports like Dortmund?

Lately, there have been some really good and useful updates for GSX Pro; I think it's great that they're constantly adding new and improved features – hats off to the GSX Team, great Work !!

cheers 😉

6 hours ago, luis70 said:

With this update, can you now pushback correctly to park at airports like Dortmund?

that all depends on the airport profile.

gsx pro 3.9.2 is out now 

• GSX (all versions) NEW: Taxi route customization on the airport map. When selecting FollowMe, Progressive Taxi or Towing, you can now click "Customize route on Map" to open the airport map and visually edit the route by clicking on taxiways to prefer or unprefer them. The route recalculates in real time through preferred taxiways. Taxiway labels are shown on the map at intermediate zoom levels for easier identification.
• GSX (all versions) NEW: Push-in to Park (Tail-in parking). Gates can now be configured for tail-in parking, where a tug pushes the aircraft backward into the gate. Dual-use gates offer a Nose-In / Tail-In choice when selecting a parking position. All ground services work correctly with tail-in parked aircraft, including mirrored vehicle positions and automatic skip of departure pushback.
• GSX (all versions) NEW: Pushback and towing can now be paused and resumed from the menu. The tug decelerates and accelerates progressively, and walkers switch to idle animation during the pause.
• GSX (all versions) NEW: Distance ruler in both 2D and 3D pushback route editors, showing major ticks every 10m and minor ticks every 1m for precise waypoint positioning.
• GSX (all versions) NEW: Menu timeout is now configurable via a slider in the Timings settings tab (20–120 seconds).
• GSX Pro NEW: Auto-restarter integration. If the GSX engine crashes, the MSFS toolbar panel detects it via heartbeat monitoring and shows status messages while the auto-restarter brings it back.
• GSX Pro Change: MSFS toolbar menu now opens faster in normal use. The loading spinner is deferred and only appears if the menu takes longer than expected to load.
• GSX (all versions) NEW: Handler scripts: new onFilterModels callback allows handlers to force-include or force-exclude vehicle models before the selection pipeline, and inject custom parameters into model condition evaluation.
• GSX (all versions) NEW: Handler scripts: new onChoosePushInMode callback allows handlers to force push-in or normal mode on dual-use gates.
• GSX (all versions) NEW: Handler scripts: new doorInTransit property and waitForDoorTransit() method on aircraft exits, for detecting and waiting on door animations in progress.
• GSX Pro NEW: Handler scripts: aviramp property on the handler allows overriding the gate's aviramp setting at the handler level, eliminating timing issues with per-gate writes.
• GSX (all versions) NEW: Handler scripts: per-parking jetwayPathThickness option in the airport customization dialog, separate from passenger path thickness.
• GSX (all versions) NEW: Airport graph node snapping. Gaps of up to 2 meters between disconnected taxiway nodes are automatically bridged, improving taxi route calculation at airports with fragmented BGL graph data.
• GSX (all versions) Change: Towing menu labels renamed to "Request Towing to Gate" / "Stop Towing" for clarity.
• GSX (all versions) Change: Push-in operator chair now rotates to pull orientation during tow and back to push orientation at detach.
• GSX (all versions) Fix: Engine restart could freeze when the airport map had been opened during the session, caused by background tile download threads blocking the shutdown sequence.
• GSX (all versions) Fix: MARS sub-position switch could leak properties (noPassengerStairs, hasJetway, etc.) from the previous sub-position when switching directly between two sub-positions without restoring the parent first.
• GSX (all versions) Fix: Traffic cones and fuel manhole were not cleaned up when switching gates, leaving stale objects from the previous gate.
• GSX Pro Fix: MSFS toolbar menu could stop responding after rapid open/close cycles, caused by stale tasklet references blocking the menu channel.
• GSX Pro Fix: MSFS toolbar menu third-party automation tools (BATC, etc.) could miss selections due to a ~100ms blind window during menu channel drain. Reduced to ~16ms.
• GSX (all versions) Fix: Fuel display crash when the SimObject text was destroyed mid-refueling.
• GSX (all versions) Fix: Crash in cargo loader when the bridge/platform tasklets were still running after dematerialization.
• GSX (all versions) Fix: Revoking services when not engaged could leave orphaned vehicles from gate preparation.
• GSX (all versions) Fix: Silent crash in the audio engine (soft_oal.dll) when Python code held an emitter reference past audio system shutdown. All OpenAL calls now check for valid context before proceeding.
• GSX (all versions) Fix: Audio engine shutdown ordering: emitters could briefly see the audio system as "initialized" while contexts were already destroyed, causing crashes during concurrent playback.
• GSX (all versions) Fix: Animation use-after-free crash when a tasklet was suspended mid-animation and another tasklet reset the animation queue. The animation system now re-checks state validity after every yield point.
• GSX (all versions) Fix: Crash in conveyor belt and cargo loader when re-materializing a vehicle after its parent had been dematerialized, caused by a null audio library reference.
• GSX (all versions) Fix: Airport data cache could grow unbounded during long sessions, consuming increasing amounts of memory.
• GSX (all versions) Fix: SimBrief reload while already engaged could cause the VDGS to re-enter lead-in mode.

 

Edited April 15Apr 15 by pete_auau

25 minutes ago, pete_auau said:

gsx pro 3.9.2 is out now 

Thx for the update Peter. Wow more updates!

Glad to see Umberto is on a roll with those updates and fixes.
I need to install GSX once more this time for MFS2024. I had basically given it a break as I was a bit disillusioned with the problems that beset GSX when i was using it with P3D but I am glad Umberto has the motivation to keep improving GSX.
The updates and fixes are most welcome! 👍

I think GSX will break the record for the longest Change Log when all version histories are combined over the years. 😎
Keep up the good work Umberto! 👏

 

43 minutes ago, pete_auau said:

GSX (all versions) NEW: Taxi route customization on the airport map. When selecting FollowMe, Progressive Taxi or Towing, you can now click "Customize route on Map" to open the airport map and visually edit the route by clicking on taxiways to prefer or unprefer them. The route recalculates in real time through preferred taxiways. Taxiway labels are shown on the map at intermediate zoom levels for easier identification.

Absolutely brilliant !!! - GSX is getting better and better, 👍 keep it up GSX Team 😘

cheers 😉

16 hours ago, Tuskin38 said:

that all depends on the airport profile.

• GSX (all versions) NEW: Push-in to Park (Tail-in parking). Gates can now be configured for tail-in parking, where a tug pushes the aircraft backward into the gate. Dual-use gates offer a Nose-In / Tail-In choice when selecting a parking position. All ground services work correctly with tail-in parked aircraft, including mirrored vehicle positions and automatic skip of departure pushback.

That's what I was looking for. Fantastic!!

A taxi route costumization? Umberto is firing from all his cannons.

Thank you for another fantastic update ... out of interest, what is a realistic 'push-back' speed for airliners (737-800 / A320 family) please?

where is the menu to      "hotfix ready----select apply from the menu"

2 minutes ago, motishow said:

where is the menu to      "hotfix ready----select apply from the menu"

isn't that one of the options above where it says "hotfix ready"?

 

We're now at version 3.9.4!

But to keep moderators and others happy I have posted in this thread which I found on page 3 ...

Here is the Change Log:

Version 3.9.4 – April 23rd, 2026

GSX Pro NEW: VR-friendly menu. A new pinned-menu mode (Disabled / Enabled / Auto-VR) keeps the panel on screen as a compact status view after menus close, recallable via hotkey without reopening from the toolbar; in VR the X icon minimizes to that status view instead of duplicating the toolbar close. Options that would open a desktop dialog (airport map, editors, settings) are greyed out with a VR-headset icon and ignore clicks. Also useful to non-VR users — especially in multi-monitor setups, where the pinned status view can live permanently on a side display.

GSX Pro NEW: Live status page. After a menu timeout or a user choice — the moments when the panel used to close automatically — the pinned menu now stays visible showing current aircraft, airport + parking (with any non-default gate customization), SimBrief status, and one line per active service with per-vehicle phase, ETA, fuel progress and bill, operator name, and "waiting for…" blockers when a service is stalled on another.

GSX (all versions) NEW: Defueling support. Picking a refueling preset below current fuel (or a SimBrief plan lower than current) auto-switches the Fuel service to defueling — the truck pumps fuel out progressively and charges a per-gallon "Defuel fee" service charge (the returned fuel isn't reused). Works for both the standard Servicing and the custom-panel (EFB / MCDU-driven) flows. Preset entries whose target is below current fuel are tagged with [DEFUEL] in the menu so the direction is obvious before picking.

GSX (all versions) NEW: Adaptive refuel presets. The 7-preset ladder shown by standard Servicing now adapts to the aircraft's total fuel capacity — GA, Regional, Narrowbody, Widebody, and Ultra-Long-Haul tiers — using the sim's own fuel density so Jet-A, 100LL, and other fuel types all tier correctly. Aircraft handler scripts can override with an airframe-specific ladder via a new fuelPresets() method; see the Handler Scripts Developer Guide. Only applies to aircraft using the default SimConnect fuel system — aircraft that drive refueling through their own EFB / MCDU take the custom-panel flow and never see the preset menu.

GSX Pro NEW: Menu graphic overhaul. Hotkey rendered as inline keycaps, menu-option numbers as smaller keycaps, two-line titles supported; per-service icons and color-coded status (grey / green / yellow) on the status page; startup progress bars redesigned with smooth animation.

GSX Pro NEW: GSX hotkey can now be rebound directly from the new status page — double-click the keycaps in the "GSX Menu" button, press the new combo, 2-second grace to confirm or re-press. The new hotkey is saved to hotkey.json and survives panel reloads and Couatl restarts.

GSX (all versions) NEW: Push-in to Park now supports "exclusive" parking stands (scenery-authored tail-in BGL), in addition to the dual mode shipped in 3.9.2. The tug spawns on the correct side from the aircraft heading at the taxiway entry, and pull-out from a tail-in parked aircraft works along the same stored route.

GSX (all versions) NEW: "Warp to point" on the airport map. Click any empty area of the Airport Viewer to drop a draggable / rotatable airplane cursor that edge-snaps to the nearest taxiway or runway; the Warp button teleports the aircraft to that position and heading.

GSX (all versions) NEW: Handler scripts: setVdgsUnits / getVdgsUnits closures let aircraft and airport handlers override the VDGS / marshaller unit of measure (metric / imperial / sim default). Airport overrides win over aircraft overrides.

GSX (all versions) NEW: Handler scripts: aircraft.idMajor and aircraft.idMinor exposed on the aircraft proxy for numeric-id filtering, as an alternative to ICAO string matching.

GSX (all versions) NEW: New per-vehicle state LVars for 3rd-party integration, one per dispatched vehicle (fuel truck, catering, de-ice, baggage loaders / trains, stairs, buses, pushback tug, GPU, water / lavatory). Named L:FSDT_GSX_VEHICLE_<CLASSNAME>_STATE (e.g. L:FSDT_GSX_VEHICLE_FUELTRUCK_STATE, L:FSDT_GSX_VEHICLE_PUSHBACK_STATE), each carries an integer sub-state that tells the vehicle's current phase — approaching, connecting hose, pumping, disconnecting, leaving, and so on. Complements the existing per-service state LVars by exposing what the individual vehicle is physically doing right now. Full reference available in the new GSX LVars Developer Guide.

GSX Pro Change: Restart flow and background stability. Progress bars now appear during external Couatl restarts and report additional phases (AI, AI Traffic, Airport, DLCs) for a smoother climb; crash detection no longer trips across a deliberate restart.

GSX (all versions) Change: MSFS Steam vs Store edition is auto-detected by UserCfg.opt modification time, fixing wrong-folder detection when both installs coexist.

GSX (all versions) Change: "Reset" on a parking customization now clears every persisted field (push-in mode, MARS sub-positions, all waypoint / path-thickness properties, sibling MARS INI sections). Previously several fields survived a reset.

GSX (all versions) Change: MARS proximity detection now accepts proximity to any sub-position's area, not only the parent's — parking at a substantially offset sub-position now correctly triggers GSX.

GSX (all versions) Change: Engine / brakes wait prompts during towing are re-shown if the state flips from "met" back to "unmet" mid-operation, so the tug no longer silently spins with no visible prompt.

GSX (all versions) Change: The "Additional Services" submenu entry now ends with a ▶ marker (or "-->" on legacy FSX / P3D), so it's obvious it opens a submenu.

GSX (all versions) Fix: Map dialogs (airport viewer, pushback quick-edit, vehicle-position editor) now block input during initial load — no more Windows "disabled window" ding or permanently unresponsive dialog when clicking during the first second.

GSX (all versions) Fix: Reposition menu now shows MARS sibling stands at the current parking; only the occupied sub-position is hidden.

GSX (all versions) Fix: Exiting the 3D parking editor no longer crashes at stands with rearPax* waypoint configurations.

GSX (all versions) Fix: Towbarless push-in now tears down completely on abort — no residual engine hum and no orphan bypass pin on the aircraft nose gear.

GSX (all versions) Fix: Push-in towing now follows the route shown on the map instead of cutting straight through obstacles; the bearing filter rejecting forward-route nodes has been removed.

GSX (all versions) Fix: Tow tug now re-materializes at its initial position after a completed tow instead of remaining at the gate.

GSX (all versions) Fix: Warp to a push-in "exclusive" parking now places the aircraft at the stand (tail-in) instead of on the push-in entry on the taxiway.

GSX (all versions) Fix: A second towing request after the first was cancelled no longer produces a one-node straight-line path (stale pending-destination tracking collapsed start and goal nodes).

GSX (all versions) Fix: Engine noise emitter: idle/rev sounds no longer keep playing after a vehicle is destroyed mid-crossfade, and subsequent run()/idle() calls no longer raise AttributeError after destroy().

GSX (all versions) Fix: Fuel billing now reflects the net fuel transfer rather than absolute work moved. Aircraft EFBs that internally drain tanks to a floor and then refill to the target (e.g. the default A320 workflow) no longer double-charge — the bill covers only the actual fuel delta the customer requested.

GSX (all versions) Fix: Deboarding clicked while the session is tearing down no longer crashes the service on an uninitialized baggage train.

i always like updates - but Virtuali needs a marketing employer to reduce the text and make a helicopter view of the changes. It seems a little to small detail is put in to these updates now. Like we all really care about the small stuff.

If Fenix or PMDG or Inibuild would do this it would have pages after pages. 

Keep it simple for the user or customer please

What is the purpose ? 

What is improved overall ?

Michael Moe

Edited April 25Apr 25 by Michael Moe

If updates notifications are meant to be only in this thread then the title should be changed to 'GSX Updates'.

Doesn't make sense otherwise.