I installed the Imaginesim KATL scenery on my flight simulator, when i go to a gate example in the picture there are 2 jetways and there isn't supposed to be 2.
I dont know if this is GSX or it's Imaginesim...
Those are not GSX jetways ( which looks much better...).
When installing GSX L2, on 3rd party scenery, nothing will change automatically, since in order to replace jetways from a 3rd party scenery, you must do several steps yourself, as first exclude the jetways that came with the scenery, and then add the GSX ones with the parking customization page. And, if the scenery comes with SODE jetways, those must be excluded in a different way, by manually removing their SODE XML file.
The only time when installing GSX L2 affects jetways with no user intervention, is on default sceneries using default jetways.