There are many GF options. I am allergic to casein and eggs as well and the staff are right on in this area. I have never had an issue and I eat there three times per month. The food is excellent and I recommend the salsa verde (YUM!) I put it on everything and it’s so fresh every time. The staff at Bartaco Stamford are very friendly and allergy aware. They immediately notify the manager of the GF order and double check the allergies with items ordered with the manager. I feel very safe eating here and I recommend it highly. It’s actually the only restaurant in Stamford besides Teff that I feel safe eating at or from. If you go on their website they list every item on the menu with the top allergens including gluten for each item in a graph type layout.