With regards to jeyways, I understand that GSX uses the CTRL + J options for default airways but what does it do for addon scenery.
GSX does nothing for the jetways, it doens't use, it doesn't change, it doesn't interact and it's not being affected by how you operate jetways. Which means, if the scenery has them using the default method, they will continue working as they were, if the scenery has static, they will continue being static, and if the scenery use a different method than default (like COM frequencies) they'll continue to work as before.
With regards to the request. I am purchasing FS2Crew for the NGX and was wondering in FSDT had thought of collaborating with Bryan at FS2Crew to get the two to interact. The FS2CRew co-pilot could call for pushback, request the follow me car, call for ground service. This would cut out the use of the onscreen menu and make FSX seem that little more realistic.
Yes, it has already been discussed here, once we'll finalize the product with all the features needed, we'll work on an API that other products can interface with.