I have a severe gluten allergy, but that sure doesn't stop me!
Here are just some of my favorites ...
TS Restaurants: O'hana, San Angel Inn, Rose and Crown, Mama Melrose
CS Restaurants: Sunshine Seasons, Flametree BBQ
At O'hana I love everything they bring. At San Angel Inn they make a delicious quesadilla and fish tacos. Rose and Crown's GF fish and chips are AMAZING ... and Mama Melrose has a really good Chicken Parmesan.
Sunshine Seaons (epcot, the land) porkchops and mashed potatoes are awesome! And you have to try the Ribs at Flametree BBQ.
There are tons of other great options, you really can't go wrong at Disney.