In the fairy tail universe, we see female celestial mages like Lucy, Yukino, Lyla, Sorano, etc, but we do not see any male characters with celestial spirit magic. So is the celestial spirit magic exclusive to females or are there male celestial spirit mages also?
Celestial Spirit Magic is a type of Magic in which the user summons Celestial Spirits by opening their gates through the use of Celestial Spirit Gate Keys. These Keys are separated into two classes: the more common Silver Keys and the rarer Gold Keys. Keys for Celestial Spirits are counted in Units (collectively without regard of Gold or Silver), and a Celestial Spirit Mage is noted by how many Units they have obtained.
Celestial Spirit Magic is not exclusive to women, although the majority of users shown in the manga are women.
Complete list of users http://fairytail.wikia.com/wiki/Celestial_Spirit_Magic