| Regimental number | 3703 |
| Date of birth | |
| Place of birth | Springton, South Australia |
| School | Lutheran School, Springton, South Australia |
| Religion | Lutheran |
| Occupation | Farmer |
| Address | Barmedman, New South Wales |
| Marital status | Single |
| Age at embarkation | 27.3 |
| Height | 5' 6.5" |
| Weight | 148 lbs |
| Next of kin | Father, Ludwig Semmler, Springton, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Sydney, New South Wales |
| Rank on enlistment | Private |
| Unit name | 55th Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/72/5 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A14 Euripides on |
| Regimental number from Nominal Roll | 3703A |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Battalion |
| Fate | Died of wounds |
| Place of death or wounding | Peronne, France |
| Age at death | 28 |
| Age at death from cemetery records | 28 |
| Place of burial | Doingt Communal Cemetery Extension (Plot I, row C, Grave No. 20), France |
| Panel number, Roll of Honour, Australian War Memorial | 30 |
| Miscellaneous information from cemetery records | Parents: Herman and Ernestine SEMMLER, Springton, South Australia |
| Other details |
War service: Western Front Wounded in action, 23 August 1918 (gun shot wound, left arm). Wounded in action (second occasion), 18 September 1918 (gun shot wound, abdomen: penetrating). Died of wounds, 55th Casualty Clearing Station, 19 September 1918. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, SEMMLER Gustave Edwin |