Does it show up in the GSX dialogue box? Because it's not showing up. Does the jetway move when I select deboarding/boarding? Because it's not.
IF you use the latest version of KIAH, GSX and SODE, you should then go to a parking with a SODE jetway, which is indicated with "/JS" on the GSX parking selection menu.
You will then see the jetway selection menu AFTER you select boarding or deboarding in GSX.
If you don't see it, it means that SODE cannot solve the jetway for some reason, usually because you parking in the wrong spot, or because your airplane is not configured properly with GSX.