Can anyone confirm that this or is not an issue withe GSX or perhaps it's something totally different.
It surely can't be a GSX issue because, as explained many times already on the forum, GSX won't ever try to operate the doors on any airplane. It will only READ their status.
So, as a general rule:
1) If you CAN open/close doors on any airplane, but GSX will still insist asking to open or close them, it is a problem of the GSX configuration for that airplane (is wrong, or it's missing)
2) If you CAN'T open/close doors in your airplane, it's never a GSX problem, and it's an issue with the airplane itself.