Stop by Disneyland's City Hall for a huge printout of all the gluten free options they have. I specially kept going back to Tomorrowland Terrace, they seemed to take allergies very seriously and they always called the chef out to the window to discuss your dietary requirements, and they specially prepare the food for you. They are very serious about avoiding cross-contamination. But pretty much most places have gluten-free buns and gluten free bread and will make substitutions for you. I was very impressed.