I found myself using the Garmin GFC 500 quite often in Flight Simulator. So I decided to design, program and print my own. Still a work in progress and first version. :
Garmin GFC 500: The Digital Autopilot Retrofit Priced for Light Aircraft - YouTube
Garmin GFC 500 autopilot w/ G5 glass combo - Porta Air Service. The Aircraft Upgrade Company. Since 1965.
Garmin GFC 500: Mooney M20 | Our GFC 500 autopilot is now approved for additional Mooney M20 aircraft — select C through G models. Garmin.com/GFC500 | By Garmin Aviation | Facebook