Gluten-free Breads

Question

Kavod harav, it is possible that I have a sensitivity to gluten. The gluten-free products that I now eat are never made from the five grains (they're made from rice, tapioca, etc.). Do I still need to wash and say the full birkath hamazon, or are these "bread" products not considered as bread al pi halacha? Toda raba!