- If the SU10 Navdata option is Disabled, the most common case is GSX loaded the wrong .BGL, either because the original was encrypted, or because it's too large, or other access issues to the Community folder.
- If the SU10 Navdata option is Enabled, provided the AIRPORT has been recognized, it's impossible GSX won't see the gates, since it's taking the data from the sim itself so, the only possible case I can think of, is GSX loaded another airport, like an auxiliary airport (helipad/airbase, etc. ) that should be visibility-excluded.