Tusker House lunch - Great Buffet options, had so much I couldn't remember them all. Got a variety of cookies for dessert.
1900 Park Fare dinner- Have not been for dinner but did breakfast twice. They had GF muffins and even donuts, plus made some of my food separate from the buffet to make sure it was safe.
ohana breakfast- Have not been here but Kona Cafe has made me GF Mickey waffles and they come from Ohana next door, so I think the options there are good.
garden grill- This was just ok for me. The food was very basic, I don't remember dessert honestly so probably the packaged stuff.
Sunshine Seasons- One of my favorites. Have had chicken with sides and salmon there. As other said there is one station that has food similar to garden grille and its mostly GF.
Hollywood & Vine- Went here for lunch, great variety at buffet. I even ate some basic items from the kids buffet. They had a great dessert, but it was chocolate mousse, I think they had some frozen items.
Old Port Royale Food Court- I stayed at CBR twice so ate here breakfast a few times and lunch. For lunch they can do the usual, burgers, sandwiches on GF bread, fries, and frozen pizzas. Dessert was typically the packaged brownies or cookies. The second year though they kept giving me FROZEN brownies. I had to wait for dessert to defrost which I thought was really rude and unhelpful. Lunch was ok, but was more convenient than QS at many parks. Being GF I had one or two bad experiences at QS in the park so we did lunch here just for it to be more relaxing. They always have a chef on hand to make your GF food.
At Yak & Yeti restaurant in AK I had the best sorbet trio for my dessert option.