You said OrbX airport. GSX replaces jetways automatically ONLY in default airports so, it's not possible that it would affect jetways on a 3rd party airport.
On a 3rd party airport, you must go through a very specific procedure to replace jetways, by first excluding the ones that come with the scenery, and then add the GSX ones at each gate. If you haven't done anything like that, which doesn't seem so from your post, the problem doesn't have anything to do with GSX Level 2, which doesn't touch jetways on 3rd party airports.