This article presents a literature review of peer-reviewed articles and dissertations that contribute to the theory and research of group mentoring. In this literature review, the author summarized the distinct perspectives that have been theorized and researched. He also reviewed several typologies including peer mentoring, one-to-many mentoring, and many-to-one mentoring, and many-to-many mentoring that have been identified in the research. Finally, he identified significant gaps that exist in the study of group mentoring.