She specializes in American women's history, the American West, and urban history. Her publications include Becoming Citizens: The Emergence and Development of the California Women's Movement, 1880-1911 (2000). With Susan E. Gray, she is a former coeditor of Frontiers: A Journal of Women Studies; together, they are currently finishing "Contingent Maps: Rethinking Western Women's History", an anthology of recently published Frontiers articles about gender and the West. Gullett is also working on a book manuscript, "New Women in a New City: Gender, Modernity, and Los Angeles, 1910-1920."