Quote Originally Posted by clipwingcub View Post
Pete, all of the panel mount gps units compatible with the G3X are as large or larger than the G400W. Freeflight makes a remote unit that is certified, but from what I understand is not compatible. I'm still looking for other units. If I find any others I will post an update.
For a price, looks like the Garmin GTN 650 is compatible with ADS-B, and it will drive the remote GTX 33ES transponder. This might give you the panel space, and a really slick radio.