Gluten free products ..not all KP

Question

Is it true not all Gluten free products are kosher for Passover? Can u tell me if Snyder's of Hanover Gluten free Pretzel Sticks Are KP? Ingredients : corn starch , Potato starch,tapioca starch,palm oil,dextrose,cellulose gum,baking powder,(sodium Acid Pyrophosphate,sodium bicarbonate,corn starch,mono calcium phosphate)salt,citric acid,yeast,soy lecithin,soda