When I have "config.modifyVanillaDoors" config set to true, the recipes in GregTech which uses vanilla doors will become corrupted. Items not craftable. When i set that config to false everything is fixed. Is there anything you can do about this? here is a screenshot of 3 broken recipes using Iron Doors.

I would say it's on GT's end. And as he did not make his source available, I can't check and/or debug.