I've booked a fireworks dessert party for Magic Kingdom and I'm a coeliac.
I've been told that I will have my own plate of brownies, cookies, fruits & sweets, and that the chef will walk me through other options available to eat, and if I feel unhappy about picking from the buffet, I can ask the chef to bring me something from the back.
I will see what happens when I go in August!
Incidentally, when I've booked all my ADR'S the only option to tick was gluten intolerance, it never asked if you were a coeliac. Hoping that my dining reservations will be okay!!