Gary accepts speaking invitations within the limitations of his own academic assignments. His sermons and conference presentations are known for their passion, humor, insight, and careful use of the ancient culture surrounding the Bible. He has spoken in a wide variety of venues throughout the United States and the Middle East. He is also a speaker at college, university or seminary faculties. His book, Mapping Your Academic Career: Charting the Course of a Professor's Life, is often used for faculty development seminars which he leads.