Gammelgaard was formerly part of the German Empire. In the German Empire, the place was called Gammelgaard (b. Atzerballig).
The place is now called Gammelgård and belongs to Denmark.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Gammelgaard (b. Atzerballig) | German Empire | Sonderburg | before the Versailles Treaty |
| Gammelgaard | Denmark | Sønderborg | after the Versailles Treaty |
| Gammelgård | Denmark | Sønderjylland | 1993 |