Gahan Family Cased Photographs 25 items Gardiner Papers, ca. 1667-1898 6 items Genealogical Office Library Collection 926 items Genealogical Office Manuscript Collection 747 items General orders from G.H.Q., and documents relating to the activities of the Dublin Brigade of the Irish Republican Army, mainly typescript with index, 1918-1921 248 items [General Post Office, Dublin 1916 Album] Collection-level description only General Post Office Garrison Photographic Collection 2 items General Sir John Maxwell Papers, 1916 23 items George Bernard Shaw Miscellaneous Papers 9 items George Fitz-Hardinge Berkeley Papers 50 items George Gavan Duffy Papers 535 items George Hugh McLean Collection, 1914-1980 18 items George Morrison Photographic Collection Collection-level description only George O'Grady collection, 1919-1955 14 items Geraldine Plunkett Dillon Papers Collection-level description only Geraldine Plunkett Dillon Papers Collection-level description only Glass slides relating to Roger Casement with In Memoriam card and scrapbook, [1916-1962] 3 items Glenwilliam Castle papers, 1710-1993 104 items Gordon Brewster Cartoon Collection 478 items Gormanston Papers, 1605-1932 23 items