Instrument options : GPS choices

GPS options available are :

Garmin Aero 500
Garmin TDS 650
Garmin PMS 650
Bendix/King KLN 90B

The additional mods you will need for the last three ones are:

https://tdssim.com/
https://pms50.com/
https://github.com/falcon71/kln90b

Only one unit is available (and powered on the avionics bus) in the plane at the same time.

You can also choose a tablet, see next page.