GSX hasn't changed anything in this version, in relationship to the position you are supposed to park.
Also, GSX doesn't have any knowledge of a 3rd party docking system so, it will continue to require the center of your plane to end in the center of the AFCAD parking, which is the same position as if you moved the plane there with the default "Go To Airport" menu command.
The only way a docking system can override this, is with an FSDT docking system.
However, GSX is entirely (internally) programmed to have any parking have its stopping position overridden, but there's no user interface to do this.
We could make a customization file for a 3rd party airport that used its own docking systems, so GSX would match them. It's not the easiest work to do, and it might take away valuable time that we could spend adding new features instead like, for example, a way for users to do it, because if we had to start customizing 3rd party airports so finely, we would then start charging per-airport, which is not a business model we like.