English: Looking south at the former entrance of the old Gallatin County High School, 404 W. Main Street, Bozeman, Montana. Designed by George Hancock, the small eastern brick structure was was constructed in 1902. The Romanesque Revival brick structure was extended with a Classical Revival wing in 1907. In 1937, the high school was vastly expanded with an Art Deco building, which became the main school building.

In 1956, Gallatin County High School was abandoned when the city constructed Bozeman High School (which still houses the city's high school). The entire structure was renamed Willson Middle School. The middle school closed in 1991, and the entire building was occupied by Bridger Alternative High School. In 2009, Bridger Alternative moved to a different building, and the Willson School (as the Art Deco structure is known) now houses administrative offices for the Bozeman Public Schools. The East School (as the original brick building is known) is no longer considered safe due to a lack of fire sprinklers and it does not meed modern earthquake codes; it has been used for storage since 2010.

The entire structure was listed on the National Register of Historic Places on January 22, 1988.

The statue out front is of Malcolm Story, grandson of Bozeman founding father Nelson C. Story. (Nelson Story also co-founded Montana State University.)