| Regimental number | 6840A |
| Place of birth | Richmond Victoria |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | Windsor, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, G.F. Gannan, 31 Newry Street, Windsor, Victoria |
| Enlistment date | 24 June 1917 |
| Date of enlistment from Nominal Roll | 8 June 1917 |
| Rank on enlistment | Private |
| Unit name | 23rd Battalion, 20th Reinforcement |
| AWM Embarkation Roll number | 23/40/5 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A71 Nestor on 21 November 1917 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 23rd Battalion |
| Fate | Returned to Australia 10 April 1919 |
