The extent to which they accommodate people can depend on how busy they are. I’ve had the experience of something being adapted to make it GF on one visit and then being told the next time by the (very rude) owner that I never ate that dish there! Milano’s a few doors away is a more coeliac-welcoming option.
The regular menu doesn't list allergens, but there are several gluten-free options or adaptable items, including bread and burger buns. I had the falafel (vegan) burger with sweet potato fries. The burger was dry, but overall good for gluten-free! The waiter said they had separate fryers, too.
Really good food and a very popular place for brunch (the weekend queues can be very long but they'll take your number and call you back when they have a table). They have gluten-free bread, so dishes like French Toast, Eggs Benedict and Eggs Florentine can be made GF. The staff are knowledgeable. Brunch is about €12 and dinner is about €19.