On their corporate website they have an allergy list. Ironically the hardshell Taco corn shells have gluten but the nacho chips and potato oles do not. Adding this info since we were looking for it and couldn't find it. There are safe foods from an ingredient list standpoint but cross contamination may likely be an issue.
The staff is friendly and knowledgeable so ask for the nutritional guide. Also, our cashier was well-trained and said he would make sure the order was gf. I only had chips and cheese sauce b/c I wasn't too hungry and was trying to fill hubby up.