after much questioning, I was told that the chips are fried in the same oil as flour taquitos. Beware! One staff person knew nothing about gluten, and another warned me off the oil. The food is perfectly acceptable Mexican, but not as close to homemade as I remember this restaurant 20 years ago. I miss the paper plates with foil, which have been replaced by Styrofoam.
The menu has great gluten free options
Three Amigos recently updated their menu to denote all gluten-free items. I spoke with the manager who confirmed the tortilla chips and the fried gluten free menu items are fried in a dedicated fryer.