Every single one owned by Disney except for a few carts as well as most others on property also have GF dining. Erin McKenna's sp? Bakery in Disney springs is top 8/refined sugar free and delicious. What type and where are you looking to dine?
Gluten Free Dairy Free WDW is a good resource for allergy menus and reviews. Just check the dates on some of them because it's possible that the gluten free options have been updated since they posted the menu if it's an older menu.