Garmin’s (GRMN) New GFC 600 Certification to Aid Aviation Unit Posted byZacks Equity Research December 9, 2021 Leave a comment on Garmin’s (GRMN) New GFC 600 Certification to Aid Aviation Unit Garmin (GRMN) receives Supplemental Type Certification from FAA for GFC 600 digital autopilot usage in Cessna P210N aircraft.