
| Regimental number | 3048 |
| Place of birth | West Maitland, New South Wales |
| School | East Maitland Superior Public School, New South Wales |
| Religion | Church of England |
| Occupation | Grocer |
| Address | Hope Street, Plattsburg, Newcastle, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Mother, Mrs Gardiner, Hope Street, Plattsburg, Newcastle, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 1st Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/18/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A69 Warilda on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 53rd Battalion |
| Fate | Killed in Action |
| Miscellaneous details (Nominal Roll) | *Spelt Bertie Gardiner on NR |
| Age at death | 29 |
| Age at death from cemetery records | 26 |
| Place of burial | No known grave |
| Commemoration details | V.C. Corner (Panel No 8), Australian Cemetery Memorial, Fromelles, France |
| Panel number, Roll of Honour, Australian War Memorial | 157 |
| Miscellaneous information from cemetery records | Parents: Theodore and Zenobia GARDINER, Hope Street, Wallsend, New South Wales |
| Family/military connections | Brother: 854 Pte Percy Theodore GARDINER, 13th Bn, killed in action, 28 August 1916. |