- Galt Papers (I), 1745/189218
- Galt Papers (III), 1750/19919
- Gamble Papers, Letters and Photographs, 1774/18861
- Gary Weiner, Collector, Papers, 1773/19381
- Gaspard Monge Portrait Print, 1746/18181
- Geddy-Harris Archive Records, 1773/1959, bulk 1890/19404
- Genealogical Society of Southwestern Pennsylvania, Collector, Material regarding Monongalia County Unrecorded Wills, 1726/17811
- George Couchman Family Papers, 1765/19351
- George Mason Papers, 1706/18582
- George Mason University Student Government records, 1968/20191
- George Washington Papers [in part: photostats, printed copies, typescripts], 1755/19322
- George Washington collection, 1654/179919
- George Whipple Ledger, 1764/18141
- George Wythe Papers, 1774/18012
- Gideon Macon Family Charts, 1602/19951