I purchased the PMS GTN750 and it is in my FS2024 Community folder. I load a C414AW variant that has the GTN750 .VNAV should work. When I go to the GPS menu, the status shows INTERNAL but the VNAV button is greyed out. I cannot get VNAV to work in the aircraft even though I have the latest (and paid) version of the GPS.

Edited August 24Aug 24 by greyspider

From my experience GTN 750 does not control VNAV. It will give you the required VS as a guidance only and you keep adjusting the VS to what it advises is it constantly requires adjusting due to airspeed etc. I could be wrong as haven’t used the GTN in a while

Edited August 25Aug 25 by jason74