| A comparative study of local government in Tuam and Armagh 1840-1940 | O'Connor, Gabriel Charles | Thesis | | 2004 |
| A history of Galway County Council = Stair Chomhairle Chontae na Gaillimhe | O'Connor, Gabriel | Monograph or Collective Volume | Galway County Council | 1999 |
| A place of genius and gentility : insights into our past, Kilkerrin, Co. Galway : historical essays on a North Galway parish | | Monograph or Collective Volume | Oidhreacht Chill Choirín | 2006 |
| Administration in Tuam before 1840 | O'Connor, Gabriel | Article in Journal | | 2004 |
| Cloonfush, County Galway | O'Connor, Gabriel | Article in Book | | 1998 |
| Conference commemoration the centenary of the birth of Robert M. Burke | O'Connor, Gabriel | Article in Journal | | 2007 |
| The old Borough of Tuam - the corporation and its charter | O'Connor, Gabriel | Article in Journal | | 2012 |
| The Tuam hunger strike - the ultimate weapon | O'Connor, Gabriel | Article in Journal | | 2013 |
| Tuam Town Commissioners : their finest hour, 1899-1925 | O'Connor, Gabriel | Article in Book | | 2014 |
| Tuam Town Commissioners: a time of change and continuity, 1899-1924 | O'Connor, Gabriel | Article in Journal | | 2007 |