The menu was marked very well for things with and without gluten and/ or other allergens.
No gluten free menu but the waiter told me most items could be made gluten free. Chips are fried in same oil as gluten, so I couldn't eat the chips and salsa. I had the tacos and they were good.
Items are marked if they contain gluten. The waiter wasn't sure about the fryer risk so he gave me the tortillas unfried. I would suggest celiacs be careful here. I wasn't 100% convinced about the safety.
Inside The Westin
Had the gf tacos, 3 different kinds, all were very good. Came in a corn tortilla. I have celiac and had no problems. This was located within our hotel, inside the Westin.