- G. William Whitehurst Papers1
- Garlinghouse Home Collection, Ranch Home No. 9540, Built Project, c. 1950s - 20231
- Garnie Walker Testa Papers and Walker-Testa Family Genealogy6
- Gary P. Carpenter collection3
- Gay and Lesbian Student Union (GLSU) Records5
- George Mason University Oral History Program collection12
- George Mason University publications34
- George Mason University student publications6
- George Washington's Mount Vernon Magazine3
- Ghost Posters collection1
- Gil and Connie Granger papers1
- Governor Ralph Northam, Office of Diversity, Equity, and Inclusion, Records,1
- Green Bag bobbleheads1
- Green Spring Garden Club, Inc., records2
- Gregory H. Swanson papers2