| Regimental number | 5576 |
| Place of birth | Jerseyville New South Wales |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Bowraville, Nambucca River, New South Wales |
| Marital status | Married |
| Age at embarkation | 24 |
| Next of kin | Father, Timothy Gannon, Bowraville, Nambucca River, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Driver |
| Unit name | 1st Field Company Engineers, Reinforcement 14 |
| AWM Embarkation Roll number | 14/20/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A54 Runic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 53rd Battalion |
| Fate | Returned to Australia |
| Family/military connections | Sister: Staff Nurse Josephine Margaret GSNNON, Australian Army Nursing Service, returned to Australia, 23 July 1919; Brother: 22802 Bombardier John Dominic GANNON, 7th Field Artillery Brigade, returned to Australia, 31 July 1918. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Date of death | |
| Place of burial | Macquarie Park Cemetery |