| Regimental number | 3340 |
| Place of birth | Cranbrook Western Australia |
| Religion | Church of England |
| Occupation | Farmer |
| Address | Cranbrook, Western Australia |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, E T Gillam, Cranbrook, Western Australia |
| Enlistment date | 29 July 1915 |
| Date of enlistment from Nominal Roll | 28 July 1915 |
| Rank on enlistment | Private |
| Unit name | 11th Battalion, 11th Reinforcement |
| AWM Embarkation Roll number | 23/28/3 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A38 Ulysses on 2 November 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 11th Battalion |
| Fate | Returned to Australia 2 April 1919 |
| Family/military connections | Brother: 1825 Pte Charles Thomas GILLAM, 44th Bn, died of wounds, 3 April 1918; Cousins: 618 Pte Sydney Davenport GILLAM, 10th Light Horse Regiment, died of wounds, 29 August 1915; 655 Trooper Hubert Evelyn GILLAM, 10th Light Horse Regiment, died of wounds, 29 August 1915; 1826 Pte Jack Clifford GILLAM MM, 44th Bn, returned to Australia, 1 July 1919; [2370] Captain Ross Hamilton DUNN MM, 28th Bn, returned to Australia, 18 December 1918. |