Public records for Irwinton identify this structure as the Wilkinson County News building, with a construction date of 1900 and a remodel date of 1960. I imagine the building has had numerous tenants over the years.
Wilkinson County News Building, Irwinton
Vanishing Georgia: Photographs by Brian Brown 
Fascinating! I can see the reporter and editor typing away in there now, preparing that week’s paper. The building look very functional.