The Jack A. Sullivan Library at Gateway helps students, parents, and staff utilize resources that facilitate both the learning and teaching of a rigorous academic curriculum. The library has over 24 computers and 1,500 volumes, as well as a wide selection of reading books and magazines. The library enjoys a close relationship with the San Francisco Public Library.
Board member Lisille Matheson was instrumental in planning for and creating Gateway's library. Her neighbor, Catherine Sullivan, wanted to support Gateway and decided to donate funds to create and sustain the library program in honor of her late husband, Jack Sullivan. The beautiful room, with tables handmade by Henry Matheson, opened in February 2001.