One enhancement I would really to see like is, particularly when it comes to selecting an arrival gate, if you could scroll down a single list of all the available parking gates, rather than having to step through page after page, some of which once you are in you cannot get back out again and have to close GSX.
I am using BeyondATC which gives you your arrival gate when you have exited the runway. Currently it is cumbersome trying to locate the same gate in GSX to activate it. a scrolling menu would make it a lot easier