I've been following a gluten free diet for over 3 years now and don't buy "gluten-free" products - I don't really see how giving it up is such a drama. The only time I've been badly caught out was eating dark chocolate coated liquorice - didn't occur to me that liquorice would be made with wheat. The following 3 days of extreme GI distress taught me a lesson I won't forget - if it's in a bottle or a packet, always read the label!
I recently bought some organic buckwheat crackers because I sometimes miss having a "spreadable" surface - it was like eating cardboard and reminded me of the days of eating Ryvitas and other cardboard-like concoctions. Yuck, never again
My advice to anyone with health issues they don't understand is to try grain/gluten free for at least 30 days to see how you feel - if you don't feel any different, no biggie, go back to eating it. On the other hand, if you feel a big difference, then continue not eating it. Simples.