Since Linux is my main computer and TC don't work there I use SportTracks.
This means that I will offer my help in the quest to make GH-561
(and maybe GH-625) usable from a SportTracs plugin let me know if I
can help in any way.
Ok, thanks for your help.
Currently I have a rough version of the plugin, which can send tracks, routes and waypoints. I didn't test it but a few times and only on my Keymaze 500, but it should work with the GH-6*5 too - apart from the routes.
I can send it to you if you want to try it on Linux.
When I receive the test sample and the protocol specification, it should not be too hard to adapt it to work also with this device.