first of all I use uk2000 airports and usually fly the captain sim 757 so if GSX compatible with both these products?
Works at default airport, FSDT airports, and all other stock, modified or 3rd party airports like UK2000, Aerosoft, ORBX, FlyTampa, latinVFR, etc.
Secondly I have seen Ryanair stairs for example but how many variations are there? (British airways , easy jet etc..)
Not sure how many there are but it's a lot, sure BA is included not sure about Ryanair but more than likely. There is a paint kit if you want to paint your own.
Does it only work on your aircraft or the A.I ones aswell?
Just on your a/c but not AI.
And finally what effect does it have on fps ??
None. It has about the same FPS effect as 1 AI a/c and since you are parked when its loading/unloading baggage, fueling, and servicing the a/c it wouldn't make that muh difference if there was an FPS hit, but there isn't any hit anyway so its really a moot point.
