Skookum pretty much bailed out of the hobby market.
They are focused on commercial drone and UAF.
You may never get a reply from them if you sent it to them without them telling you it was OK to send it.
You may want to re-post this in the "Helicopter › e-Classifieds - Trade Wanted" section.
And, check the "Helicopter › Classifieds - Electronics" for 720BE and GPS modules.
A lot of people are selling the Skookum stuff due to lack of support.
And, maybe start looking for another RC Heli FBL that supports GPS and GPS features.
Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!