Just around a decade ago, when my fiance's grandma was one of the first in their family to be diagnosed with celiac disease and my college roomie found out she was allergic, too, you'd be in treacherous territory by even trying to dine out with a food allergy. Thankfully, it's getting less stressful, as restaurants do their best to cater to people who are dairy-free, nut-free, or gluten-free, or suffer from any other food sensitivities.
I've seen it firsthand. Usually, whenever my fiance's brother, wife, and little girls come to visit us, we go to an Italian restaurant that does gluten-free cooking. It's a treat for them to get to eat a delicious pasta dish at a restaurant, just like anyone else who doesn't have celiac disease. And it's always so nice to see the chef come out and speak with us about all of our options and explain how the food is prepared, so there's no cross-contamination.