Google "Gluten Free at Disney". There are two awesome sites-- one is Alexis' GF Adventures (author used to be in Orlando area, but has moved & continues to review & blog) AND a GF /Dairy Free in WDW site. Both have excellent reviews of nearly every restaurant. The second has posted most of the Disney allergy menus--which really makes planning ahead easy as you can see if there's something you & your kiddo will like or if you'll need to speak to a chef to see what adjustments can be made. I'm not Celiac but have a really nasty gluten intolerance that can ruin the day if I'm not eating clean.
Disney is heaven in that I can have awesome choices there & feel good.
Biggest tip is just be prepared to wait the extra 5-15 min for extra prep time...and then enjoy GF Mickey waffles every day!!! (If on site with food court)...I love POFQ for that reason. This past trip I was in love with Blaze pizza in Dis Springs---legitimately the 1st GF pizza I've had that even was good as COLD leftovers later in the room. How old is your kiddo? I can list my favorites by park if you like.