--given the ranges, that's a rather unequivocal positive result.

Time to get him off gluten. (What are your son's symptoms/complaints?)

It is life-changing, yes, but do-able. If you have celiac, you know this--and know that the biggest difficulties are in eliminating non-obvious sources of gluten that sneaks into foods, cosmetics, etc., beyond eliminating obvious wheat/rye/barley sources.