I recently cruised in May on the Breeze with a friend/co-worker who eats gluten-free. We noted this when we booked the cruise, but then as soon as we got on-board, we asked how to ensure a GF dining experience for her and were directed to the "Menu Mate" kiosk in the middle of the buffet (near the Wok station if I remember correctly). Ask and someone will direct you. There, they took down her name and helped with GF selections for dinner in the MDR that night. Then, before leaving the table after each evening meal, one of the servers helped with GF selections for breakfast & dinner for the next day. What was impressive, was each evening the servers would automatically bring her a plate of GF bread without needed to ask. She said it was quite good. There are lots of selections, even for breakfast - like GF pancakes, waffles, etc. There was even GF bread at the deli and at the pizza stations but needed to be requested. She assumed the french fries in the deli were GF, but when asked for them, the server said they weren't but offered her the GF potato salad. (Impressive, again, that they were watching out.) We were told there is always at least one GF dessert in the dessert buffet, but I don't remember if she ever tried a dessert, generally opting for frozen yogurt. (The chocolate melting cake in the MDR is GF and she had that most nights - like everyone else. LOL!) Definitely lots of GF options which made cruising easier and more enjoyable for her. because this was a huge concern of hers as a first-time cruiser.
Hope this helps.