We did. For ADD and PANDAS (a neuro-psychiatric disorder)
I have a food blog because we cut so many foods that I wanted to document our progress, trials and successes along the way. We've seen tons of healing for the whole family (we all do the diet.)
www.chickiepea.wordpress.com
another great option is the Feingold program. Cutting gluten and dairy are recommended for lots of neuro issues, not just ADD.
Also, there is NO test for gluten intolerance when you are talking about the blood/brain barrier issues involved like with ADD, Autism, etc. The tests for even Celiac are poor at best.
There are lots of alternative therapies out there too, to help supplement. We see an NRT (nutritional response therapist) and chiro. There are DAN! doctors too (not just for Autism) and naturopaths, as well as various therapists like pediatric neuropsychiatrists who can do tests and recommend therapies.
I would do ANYTHING before I would do meds. We did meds and it made various things SO much worse, and the side-effects were scary and long-lasting too :(
I'm happy to chat more about experiences, recipes, ideas, etc. if you want.
-M.