Here are some protein bars that I have found in different stores.

Luna Protein Bars                           ( Available at Target, Harmon’s, and I think Costco)

G2G -Good2Go                                           ( I Found these at Good Earth)

NoGii                                                (CVS Pharms, Shopko, many more using the online store locator)

High Protein, paleo, and kids bars

http://www.nogii.com/index.html

GNC has a list of gluten free protein bars as well.

http://www.gnc.com/family/index.jsp?categoryId=12316542

Muscle milk powder and individual premixed milks are gluten free too.