The Swift GC-1A and GC-1B has been added to the Garmin G5 AML – the listing of aircraft models approved for the G5 Installation STC. This STC (SA 01818WI) permits the installation of the G5 as the primary attitude indicator with the retention of the original rate of turn indicator.
Additionally, the G5 has recently received approval for the installation of a second G5 configured as a DG/HSI. From AOPA’s Article:
The G5 earned approval in July 2016 as a non-technical standard order attitude indicator. Garmin announced in March that it anticipated an expansion of the approval to enable aircraft owners to install two G5s and eliminate the dependency on the airplane’s vacuum system for attitude and heading information.
When paired with select VHF nav/com or GPS navigators, the G5 can be considered primary for displaying magnetic heading, VOR/LOC guidance, and GPS guidance, as well as distance and groundspeed, Garmin said.