I don't recommend going to Sicily for celiacs. They boast about having separate kitchens and avoiding cross-contamination, but it turns out everything is pre-made and they only heat it up. Yes, they have gluten-free pizzas, but you can't order any special pasta to your liking because they don't have a kitchen and can't prepare anything at all.
I needed some plain boiled white spaghetti, and their response was that if I was sick, it wasn't their problem! Very unprofessional and really unpleasant...
So you know how this restaurant treats you.