I have GSX v1 installed with no intention whatsoever to move to GSX2.
This is of course entirely irrelevant to your issue but, regardless if you want to buy Level 2 or not, it's still best if you download and install the latest installer, something I guess you have been already prompted by the Live Updater, otherwise you won't have access to the latest updates, and we cannot support you properly.
While the latest installers includes all GSX Level 2 files, if you don't want to buy it, you can always go back to the default jetways with the GSX Control Panel, so GSX will work exactly as it always was, but at least it's the latest version.
I have just installed Aerosoft's simWings Anchorage Professional,(Ted Stevens International PANC known the world over except for GSX) because when trying to use GSX, lo and behold, it cannot find a major international airport but instead its AFCAD can only find Lake Hood sea-plane base. Great, a lovely sea-plane base I am sure but quite useless to park a 747 freighter there!
This has been discussed so many times already on the forum, for example here:
http://www.fsdreamteam.com/forum/index.php/topic,17212.msg123513.html#msg123513And of course, it's also explained at Page 25 of the GSX manual, the "Airport Visibility" paragraph, which explains how to deal with Auxiliary airports/helipads/seaplane bases very close to the main airport.