| Bailieborg District Model School 1854 | O'Reilly, G. H. | Article in Journal | | 1999 |
| Carrick-on-Shannon, 1844 | O'Reilly, G. H. | Article in Journal | | 2014 |
| Hilliard - from Wicklow to Australia | Johnson, StephenO'Reilly, G. H. | Article in Journal | | 2005 |
| History of George's Place and the Reillys | O'Reilly, G. H. | Article in Journal | | 1999 |
| History of the Royal Hibernian Military School, Dublin | O'Reilly, G. H. | Monograph or Collective Volume | Genealogical Society of Ireland | 2001 |
| Minutes of the Municipal Council of the city of Dublin 1893- a source for genealogy | O'Reilly, G. H. | Article in Journal | | 1998 |
| Who was Eliza Kenny? | O'Reilly, G. H. | Article in Journal | | 2013 |
| Wicklow - Australia - England - Norway | Johnson, Steven ; O'Reilly, G. H. | Article in Journal | | 2012 |