Gangnan is a district of Guigang, a prefecture-level city in the Guangxi region of China. It forms part of the southern portion of Guigang's urban area.
As a district, Gangnan serves as one of the administrative subdivisions through which Guigang is governed. Guangxi itself is an autonomous region in southern China, and Guigang lies in its eastern part.
Detailed information about Gangnan's population, economy, and landmarks is limited in readily available sources, so the district is best known simply as one of the constituent districts making up the city of Guigang.