https://www.glutenfreedairyfreewdw.com/menus/
This has the best info!
I remember the chicken skewers at Harambe Market being gluten free, and there's also an allergy food kiosk which had some yummy GF donuts, etc for a few prepackaged treats. I know there are other choices as well at Flame Tree, etc.
The chicken potato hash bowl from Satuli Canteen is GF and its absolutely delicious!!!! I cant stress enough how good it is. Definitely my fave QS at disney.