Like the Title says: Please implement an Option (GSX Settings UI, ini File or Aircraft Profile) to disable PMDG Advanced Integration completely: so no Synch, no Ground-Equipment Handling, nothing - basically treating a PMDG Aircraft like any other Aircraft.
It would be preferable as GSX Setting which can be set via L-Var - so an external Integration could set it dynamically when it runs, without the User needing to do anything special Configuration-wise.
Also: this Option is meant for all Advanced Integrations - so if there should be any future Advanced Integration for other Aircrafts, it would be reasonable to have a common enabled/disable Setting for all of them!
Reason: Having that Integration enabled all the Times makes it very difficult to impossible for external 3rd Parties to do an Integration (e.g. like Fenix2GSX, brokering between the Aircraft and GSX)

