I just contacted the manufacturer Body Fortress and got this reply:
Body Fortress Super Advanced Whey Protein Chocolate (product # 44320 bulk # 29648), Vanilla (product # 44315 bulk # 29641), Cookies and Cream (product # 18490 bulk # 29654) and Strawberry (product # 18495 Bulk # 29649) are gluten free.
I buy the 2lb canister at Walmart for about $15.