Called ahead and they told me I can eat everything on the menu EXCEPT fried toppings (which I think are just the fried onions--I think they get them from a supplier rather than fry them in house) and the Queso. I've been back a few times and really like the Gringo taco (without the onions) and the churro fries. Delicious!
They change gloves on request and seem very aware/respectful of gluten sensitivities.
Watch out for the candied jalapenos--sometimes they're super spicy!
— Somewhat
— No gluten-free information on the menu
— Most/All
— Excellent