- Gabriel Galt Williamson collection, 1825/19391
- Gaius Dickinson Letters, 1791/19301
- Galen W. Ewing Papers, 1840/1938, bulk 1840/19382
- Galt Papers (I), 1745/1892121
- Galt Papers (II), 1840/186228
- Galt Papers (III), 1750/199156
- Galt Papers (IV), 1819/18751
- Gamble Papers, Letters and Photographs, 1774/18861
- Gard Family Correspondence, 1828/1874, bulk 1841/18491
- Garland family papers, 1830/19112
- Garrett Family Papers, 1786/19288
- Garth Family papers, 1798/187211
- Gary Weiner, Collector, Papers, 1773/19381
- Gay family papers, 1829/19222
- Geddy-Harris Archive Records, 1773/1959, bulk 1890/19404