I'm not sure if this has anything to do with KJFK or GSX, but I thought I post this issue here and see if any of the FSDT moderators can help with a possible solution.
First of all let me tell you what programs I have, which all have the capability to help move the gates; GSX, FS2Crew, and Ultimate Traffic II. The funny thing is that all these programs work fine at KLAS when I tried it, but at KJFK with both are from FSDT, does not. At KJFK when it comes time to activate the gate to move it against the door, it just shakes but does not move. Any ideas why this is happening?