Well, both pitot tubes use the same air hose, so that shouldn't be an issue.
I don't know about the Dynon, but the Garmin pitot system can use a simple switch to control the heater (the regulated version does use a communication wire back to the avionics, so that may not work).
For mounting to the wing, I believe the Gretz pitot mast (or something similar) works for both the Dynon and Garmin pitot systems.