I have bought just GSX.... Do I have the wrong expectation and jetways should not move in GSX or Am I missing some setup?
The base GSX never controlled jetways. But installingGSX Level 2 in Trial, has replaced all default jetways with the new SODE jetways, so you can see how much better they look, worldwide.
Of course, they ANIMATE only at Trial airports, otherwise it wouldn't be much of a Trial...
As explained in the manual, at Page 4 and Page 44, you can use the GSX Control Panel if you want to go back to the default (ugly, but animated) jetways, for example because you are not interested in purchasing GSX Level 2.