You have to be specific and check for each dish you are ordering, but I order from here alot and haven't experienced a reaction.
Walked past four other Thai restaurants to come here because of a gf menu. There is no gluten free menu but they will make gluten free and negotiating was worrisome.
Been to this place many times and love the food. Many items are gf, others just ask about and they can make gf. Best gf Thai in Berkeley!