I have only ordered from them twice since having to go GF, and it was great both times! I would refer to other commenters tips on the protocols the employees follow as far as how safe they are with criss contamination, but as a former sandwich fast food employee, I know they have to be very careful when someone says they have an allergy, and they are trained on how to handle it.
I ordered the #7, which I always get, with the GF bread, and I will say it was denser and drier than usual. The second time I ordered, I compromised with adding extra condiments and doubling the meat. Worked perfectly! Though I paid a little extra for the GF bread and the double meat, it gave me more servings than usual, so it almost evened out in price.
— Somewhat
— Gluten-free items are marked on the main menu
— Most/All
— Good