The parking size int the AFCAD is not relevant, if there's a GSX customization file, which will take precedence. And, the GSX customization file we provided with the scenery (kclt-fsdt.ini), list a wingspan of 65.0 meters, so that's the only parameter that counts.
It may not be all that relevant for the user and his aircraft but what about the AI that doesn't use GSX for parking?
The gate already had a 65m wingspan limit and the aircraft.cfg says 64.44m, so accordingly GSX should offer me those stands. It didn't.I changed D11 and D12 to GATE HEAVY and now GSX does. Problem solved.
It's not rocket science. 5 minutes with ADE. Simply adjusted some of the radius and codes.