The Georgia Southern and Florida Railway (reporting mark GSF), also known as the Suwanee River Route from its crossing of the Suwanee River, was founded in 1885 as the Georgia Southern and Florida Railroad and began operations between Macon, GA and Valdosta, GA in 1889, extending to Palatka, FL in 1890.
The GS&F was eventually acquired by the Norfolk Southern Railway and still operates as a subsidiary.
As of November 2012, at least one operating Norfolk Southern locomotive retains GSF reporting marks.
The remaining line is still in service and operated by Norfolk Southern Railway.
[2] It is designated as Norfolk Southern's Macon District from Macon to Valdosta, and the Navair District from Valdosta to end of the line in Navair (just south of Lake City).