Gose originated in Goslar, a small town in Eastern Germany. It is unknown if the beer style is named after the town or the Gose River that flows through town. The town was named after the river, so somehow all three are related.
The town of Golar was founded in the 10th century. Silver deposits were found close by along with other minerals such as copper, zinc, lead, and salt.
With such minerals prevalent around town, it is inevitable that the groundwater would contain salt.
The beer style under the name Gose first appeared in the late 15th century. It was not recognized until the early 18th century. Many articles allude to Gose being around for at least 1000 years.
Although the sources are scarce, it is possible the style was known by another name.
Gose began as a beer style in Goslar, however, it grew up in the town called Lei