The staff knows what is GF, the food is made in a kitchen and away from a contaminated plancha.
Everything is home made, the owner is gluten sensitive.. Even the mustard is gluten free
There are burguers in a GF bun, with cheese and Fries. The Know about cross contamination
They do have gluten free buns and beer but you’ll have to know a little Spanish to get it. Nice atmosphere and good prices. Burgers were average, a bit different from American ones if that’s what you’re used to.