Just purchased GSX very nice guys 3 questions 1.) Park me window keeps popping up for no reason how do I get rid of this
Parkme window will surely not appear for "no reason", but only if you press the ParkMe key combination. If you install GSX as the last thing you do, its installer should disable ParkMe but, if you install a scenery after it, using an old installer, it will reinstall it. You can fix this by removing the FSX\fsdreamteam\Couatl\parkme folder, if you have one.
2.) KBOS pushback not available at 1 of the jetways not sure about that also
As explained, many times already on the forum, GSX respects the Pushback preference as set in the AFCAD so, if the AFCAD of the scenery says "None", there will be no Pushback. That's why there's a "Customize this parking position" option in GSX, were you can override such things, like Pushback preference, without having to edit the AFCAD.
3.) I have dirk addon trucks it appears with the gsx both pushback tugs are visible at the sametime anyway to fix that, thank you.
If you used the most current version of the installer, it should have removed them automatically. Have you seen such message at the end of the install ?