I sent a second query to Garmin in an attempt to clarify my first question, explaining that Dynon has an ARINC 429 module that allows connection and full function with the GNS 430W, and were the outputs from the GNT 650 the same, allowing us to anticipate that the Skyview would be equally functional with the GNT 650. Here is his reply:
"Thank you for contacting Garmin International,
The output on the GTN's are the same as the GNS units. But this is a interconnect we have never tried so I do not know if it will work.
With Best Regards,
George K.
Field Service Engineer
Garmin Aviation Product Support "
So there we are. Most likely the GNT 650 will work just fine with the Skyview, but someone has to actually perform the experiment and see.