This restaurant is a dream for food allergies! I am not able to consume gluten and have a tomato allergy--Red Robin is one of the few restaurants I've found that takes these warnings seriously.
For those that have gluten sensitivities or allergies, gluten-free buns (that aren't awful) are available and there is a dedicated GF fryer for French fries. They also mark your ticket with any known allergies so the kitchen is aware. The only exception I've found to this is the Red Robin seasoning--it contains tomato powder and does not come up on either the website or their restaurant system allergy alerts. Their website is EXTREMELY helpful in learning how to make substitutions to get a great meal that meets your needs so you can plan before you come. Highly recommend!