From that reply, I don't think it's very clear what these variables do and how GSX works.
From your info about ProSim using a WASM module to animate doors, it should be clear that, having GSX automatically open doors wouldn't work, unless the ProSim program was made in a way that its module just animates the door but it would otherwise react to the standard door trigger commands.
I don't think this is the case, because if it was, it would have been enough to just tell GSX which numeric code the event use, and it would work like any default airplane. But the usage of a WASM module tells me it's not "just" animating the doors but, likely, simulating the systems behind them in a custom way, for example preventing the door to be opened in case of an electrical failure, not using default systems.
So, let's assume you can't use GSX own automatic door opening feature, due to the underlying simulation we can't affect with "just" a standard door trigger key press (it would have been overkill to have doors handled by a WASM module, if there wasn't some custom behavior added )
What these variables do, is just telling the airplane code "GSX WOULD LIKE to have this door open, could YOU please open it ?", so the airplane code can do whatever it needs to do to either open the door itself, so from your point of view it would be AS IF GSX opened it automatically, or possibly issue some kind of warning, so you would *know* the door can't be opened for some reason, which you'll then have to solve.
