- G. Harry Bayles Papers, 1890/19551
- Garlow Family Papers, 1891/19671
- Genealogical Society of Southwestern Pennsylvania, Collector, Material regarding Monongalia County Unrecorded Wills, 1726/17811
- George W. Fairfax Papers, 1806/18851
- George W. Fairfax Papers, 1832/18981
- George W. Johnson (1837-1902) Papers, 1860/19601
- Georgia C. Price Genealogy Research Papers, 1804/19721
- Gibson Lamb Cranmer Papers regarding Statehood and Other Material, 1787/1895, bulk 1822/18811
- Gordon, Dickinson, and Related Families of the Cheat Lake Area, Monongalia County Family Papers, 1915/19801
- Greene County, Pennsylvania, Genealogy Index, 1960/19801