Gryffindor Boys' Dormitories

In the Gryffindor common room, you'll find two doors that open to spiral staircases. These staircases lead to both the boys' and girls' dormitories. Be sure that you proceed to the correct dormitory, though! There are strict house rules that prevent girls from entering the boys' dormitory and boys from entering the girls' dormitory! As a matter of fact, the stairs that lead to the girls' dormitory have been charmed to turn into a slide shall any boy attempt to climb them.

To be on the safe side, remember that boys' dormitories are upstairs and to the right, while girls' dormitories are upstairs and to the left.