The answer is the same-- the grain has to have gluten in it so you have to check to see what the grains are.
Are you worried about the grain having toxins in it? That is not a baking question.
I am pretty sure any whole wheat and barley including those that I buy in 55 lb bags to feed chickens have gluten in them. Question is have anyone tried to mill them to use for baking and the safety of that.