For all Disney Owned Restaurants, both quick service and table service, you can see what GF (and other allergy) options are available by scrolling all the way to the very bottom (past the kids menus and all the alcohol) of every menu in the
MDE app.
Non Disney owned/3rd PArty owned restaurants will not have this feature in MDE but you can usually find allergy menus for some of these restaurants by googling the restaurant name + allergy menu.
I eat gluten free AND dairy free and have had no trouble finding enough to eat at all 4 parls and Disney Springs.