The jetways in your screenshot are not GSX L2 jetways ( GSX jetways looks *FAR* better!! ), they look like standard jetways, so nothing of their operation is controlled by GSX.
And yes, it's very well know standard jetways are bugged, that was the main point of SODE and GSX L2, but before you can enjoy them, you must replace the jetways on that airport with GSX.
If it's a default airport, they are supposed to be replaced automatically by GSX, but it's not very clear if that scenery is default or not.
