Of course, at least within some margin of contamination. Identity preserved allows no more than 0.5% contamination, which is the best in the biz. But, the problem is that the earlier commenter didn't trust GMO vendors, not GMOs themselves. As in: Non-GMOs from a GMO vendor are equally untrustworthy. Hell, even a hat with a GMO vendor's logo on it is untrustworthy according to that commenter.

Unless you're sticking to food that doesn't have GMOs to begin with (which, to be fair, is almost all food!), you're going to be searching high and low to find a vendor that doesn't also dabble in GMOs.