I don't think a mask is going to be enough. Plus having worn them myself at times they are uncomfortable and unless they are respirators air does leak around them. I baked for a living for a short time and know that you are likely covered in flour by the end of the day. If you really love baking and there isn't a gluten free bakery that is hiring near you perhaps you could start one up. Depending on your city's codes you might even be able to do it out of your house or a converted garage.
I am sorry you are being put in such a tough spot. I hope you can come up with a good resolution to this problem.