On Friday, July 4, 2014 2:39:39 AM UTC-4, Darryl Ramm wrote:

The situation for experiential aircraft, including gliders, is a bit different. You should be able to do an install with a non TSO-compliant GPS source. But contact and work with the manufacture on doing this and especially on making sure that the ADS-B out SIL and other settings correctly reflect the reduced GPS source specifications.

It would be very interesting if someone with the skills/knowledge/persistence to run the gauntlet would do this in the USA with a Trig Transponder + Power Flarm in an experimental aircraft/glider.