Those jetways are the replacement model for the default jetways so, if you are not using a specific GSX profile and/or you haven't customized them yourself, I guess they have been automatically replaced by GSX just like in the default sceneries.
If only some gates are wrong, it seems they are simply reversed in the AFCAD. Of course, if you do your own GSX customization, you can fix everything, otherwise you must edit the AFCAD ( or tell the developer )