Qdoba Mexican Grill is a fast food restaurant located at 2222 Walnut Street in Cary and in Beaver Creek Commons in Apex. In addition to a very complete listing of common allergen information (including Wheat and Other Glutens) http://www.qdoba.com/Allergens.aspx, they provide a comprehensive list of ingredients (even indicating that maltodextrin is from corn) http://www.qdoba.com/Documents/allergen.pdf .
From their website:
At Qdoba, we care about giving you the information you need to make informed decisions about eating. Food intolerances make these decisions even more important. Ingredients like wheat, soy, milk, eggs, nuts and fish are found in certain food items served at Qdoba.
We have found that the employees (and especially the manager) at the Apex Qdoba truly live up to their statement on their website. When we order, we inform them that our daughter cannot have gluten. The employees will change gloves and accommodate our special needs. We typically get a cheese quesadilla made with a Soft White Corn Tortilla and Black Beans. They have a wide selection of salads, meats, and salsas.