I purchase from Fly Tampa CYUL scene. The bording ramp are not moving
That's because they are made like that in the scenery.
Is with GSX ground services it will move keeping my cyul scene?
No, since GSX is a fully native FSX product, it expects the scenery developer used the default jetway animation feature, which is provided in FSX by default at all default airports. Doing animated jetways in FS9 was very hard, but there's no reason not to add them on an FSX product.
All the FSDT sceneries, plus latest sceneries from some of the best designers out there (such as Flightbeam, UK2000, Wingcreation, OrbX), comes with proper FSX animated jetways already.
Basically, GSX won't change in any way how jetways works at any airport. If the are animated using the standard FSX method, they will continue working like that, if they are static, they'll remain static with GSX, but of course GSX will still provide all its services at such airports.