Originally Posted by
mikesutton
Personally I would say you're probably on your own to devise a mounting plate if you want to use that existing bracket. GPS antennas such as the GA35, 36, etc have some clearly defined mounting criteria which Garmin covers, spacing from Com antennas and things like that. Do you have an antenna on the turtle deck already? There are combination GPS / Com antennas that would replace the existing Com antenna on the turtle deck, which is just one possibility. If you don't have a Com antenna on the turtle deck, that location would be a good location for a GPS antenna. Be wary of getting the GPS and Com antennas too close to each other though, regardless of how you end up mounting it.
Best of luck on that
Mike Sutton
Cubcrafters Avionics