| Regimental number | 2388 |
| Date of birth | 26 April 1896 |
| Place of birth | Krambach New South Wales |
| School | St Stanislaw, Bathurst, New South Wales |
| Religion | Roman Catholic |
| Occupation | Station manager |
| Address | Manning River, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, John James Gallagher, Bundook, Manning River, New South Wales |
| Enlistment date | 6 February 1917 |
| Rank on enlistment | Private |
| Unit name | February 1917 Reinforcements, Imperial Camel Corps |
| AWM Embarkation Roll number | 11/14/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board RMS Morea on 17 February 1917 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 12th Light Horse Regiment |
| Fate | Returned to Australia 17 July 1919 |
| Family/military connections | Brother: 4421 Private Oswald GALLAGHER, 20th Battalion, 11th Reinforcement; killed in action 16 November 1916, France. |
| Miscellaneous details | Embarked with unit - Camel Corps February 1917 Reinforcements |
| Date of death | 4 October 1980 |
| Place of burial | Rookwood Necropolis, Sydney, New South Wales |