Same experience as I've had at other Bagels & Beans restaurants; they offer various toppings/fillings, most are available on a gluten free bagel, if not they'll inform you. Staff here always asks whether you are intolerant or have coeliacs, so they know just how careful they have to be. As far as I know they always use a clean space and utensils for GF orders.
— Somewhat
— Gluten-free items are marked on the main menu
— Some
— Good