GF may not be as simple a subject as you might think. Grain seeds have been selected over the years to make better bread resulting in the gluten content being increased several times over. If your gluten intolerance is severe you might be diagnosed as a celiac, but a large percentage of the population never gets diagnosed and suffers forever.
A Veterinary by the name of John Symes has a website devoted to the Gluten problem titled DOGTORJ.com in which he describes the gluten problems that affect animals and humans. He has found that the effect of gluten is not as simple as we are led to believe and it varies from individual to individual and also varies as to symptom and degree.
A study out of Finland relates gluten to mental problems and I have found from personal experience, similarly, that milk can cause many problems . I'm not sure of a relationship to gluten, all I know is that my sinus, lung and rheumatism problems all left after I quit milk.
I guess what I am saying is that unless you know for sure that you are gluten tolerant, be cautious.
I am also curious to know if gluten or its' effects are diminished by fermentation and if so, is it dependent on the type of yeast or other factors.