Is General Mills gluten free oatmeal kosher?

Question

My daughter has celiac . I have been looking for hot instant oatmeal for a very long time . Finally General Mills came out with it . It's a box with 3 different favors : maple brown sugar - whole grain oats , sugar, salt ,natural flavor . ,apple cinnamon -whole grain oats , sugar, dried apples ,cinnamon , salt . On this box there is no marking . Most General Mills products do have . Is there a reason why this does not have a marking ?