Got or thinking of a GMC 307
Sportyís Pilot Supply has a new Webinar on the GFC 500, which is basically the GMC 307 with a Track button and certified. It is a good presentation on the operation of this system. Itís worth watching if you are considering this system or just want to freshen up on the system. You can go to their WEB site or Google Sportyís Webinar.
Also, if you go to Garmin and look up the GFC 500, they have STC supplements for several certified aircraft. Itís something that you could easily adapt and add a autopilot section to your POH. And checked out the calibration setting you have for your GMC 307 system to what they have standardized with the certified GFC 500.