Been checking a few things yesterday.
ZINC & IRON supplements beyond the levels of doses in the supplements mentioned on this thread should be medically supervised. If you aren't sure your kid is getting enough of either of these a trip to the GP's is in order. (Robin Pauc himself reccomends this in his book, as he isn't a medical doctor). Both can be easily checked with a simple blood test.
We all know about over supplementation of Vit A, but it seems as a group we have less knowledge about zinc, so I thought that might be worth highlighting.
Below is just the impression I got last night after doing an old fashioned "compare and contrast" exercise with my highlighter pens.
I'd say if your kid has gut issues (and you'll KNOW if poos are a problem!), start with the GAPS diet with an eventual goal being to move onto the Brain Food Plan only after the gut has healed.
There's also a lot more info on pre & pro biotics in the GAPS books, as Robin Pauc's books are a little thin on info for this area.
The GAPS author is medically qualified and her dietry explanations are much more in depth. However she doesn't touch on specifc theraputic excercises so her focus is much narrower. However she does address "True Autism", which Robin Pauc's protocol is not designed to address.