GSX already does that, but only for some FSDT airports that are specifically programmed to do that. The program is totally ready to handle it, it's just we don't have an user interface for it in the scenery editor that would make it easy to use.
It will probably be part of enhancements of the scenery editor that we have already planned, that will also allow to place our interactive docking systems in every scenery (default or 3rd party).