Is there a fastest way by changing the .ini file of GSX and telling him which .bgl files has to look at (I noticed it is pointing to the default .bgl file) and telling it where is the .bgl made by orbx?
You still don't understand. As I've said, several times by now, the problem doesn't have anything to do with GSX, the problem is you see the default scenery showing up, instead of the OrbX scenery.
You cannot just change the .INI file to "point" to a .BGL, the .INI file is not "pointing" at anything, the name of the .BGL is to prevent the .INI file to be used when there's another .BGL active, not the other way around.
So, the issue is that GSX IS using the OrbX AFCAD, that's why the .INI loads jetways that doesn't seem in the correct place because...the OrbX scenery is not loading for some reason, and you have the default instead.
So, again, your should understand why the OrbX scenery doesn't show and, as I've said several times by now, this cannot possibly be caused by GSX, which is fact is thinking the OrbX scenery *should* work, otherwise it wouldn't try to load the customization you made for it before.