Nothing in GSX will affect if jetways works, or not. That is, of course, assuming you use the FSDT Installer correctly, and have all the 3rd party jetway excluded from replacement. Once you done that, there's nothing else to do, and every issue you have with jetways, is completely unrelated with GSX.
There's a known issue with Paris jetways, not working because of a conflict with Asobo own Volocopter package.