they told me I need AES for moving jetways! because their native airports' jetways don't move! So, what does that mean in regards to GSX?? Would you guys take care of moving jetways for every airport?
This was explained and discussed a long time ago and, right from the start we always said GSX wouldn't replace what scenery developers should do in the first place, at least if they claim a scenery being "FSX native", since moving jetways are a default FSX feature.
Asking to use AES had some sense under FS9, since it wasn't something that FS9 did very well (although we *did* some FS9 sceneries with moving jetways without requiring AES...), but there are no excuse in FSX not to do it.
If we had to create moving jetways for every 3rd party airport, we should interact with developers, which is a burden we'll gladly leave to AES, and some are even openly opposed to it. But, different from AES, even on those airports were the developers oppose to AES, you WILL be able to use GSX in full, without moving jetways of course, but all the rest will work.
In any case, this doesn't mean we would never cover jetways, because the FSX system is by no means perfect so, at a certain point in time, GSX will take care of jetways too, but surely not the initial release.