I've got only one GA aircraft in my hangar that can fly a GPS approach on autopilot,VNAV and LNAV coupled. And that is the Flight1 Mustang.The RXP GNS will provide the glideslope guidance and several airplanes displaythe glideslope needle so you can hand fly the approach, the RealAir Duke is one of them.But the majority of G1000 equipped aircraft that I've seen do neither.Are there other GA aircraft out there that have this capability, or are thereautopilots that can be installed that will couple to the GNS-W for example?

I've got only one GA aircraft in my hangar that can fly a GPS approach on autopilot,VNAV and LNAV coupled. And that is the Flight1 Mustang.The RXP GNS will provide the glideslope guidance and several airplanes displaythe glideslope needle so you can hand fly the approach, the RealAir Duke is one of them.But the majority of G1000 equipped aircraft that I've seen do neither.Are there other GA aircraft out there that have this capability, or are thereautopilots that can be installed that will couple to the GNS-W for example?

Bert, as far as we know the Mustang is the only one which currently offers the full features as you've described.If not mistaken I believe you are wishing for custom AP which can fly a WAAS approach.While it possible to do it takes some pretty fair programming because WAAS approaches do not exist in FSDB but only in custom DBs or the Garmin DB as used in the RXP unit.Note that JL has not produced such an AP so suspect the F1 has a lead on that type of AP. Jim can of course correct me on that.I can say that the DA42 we are building is not WAAS approved and so we are making no effort to include WAAS in our G1000 so no need for such an AP. :(