.GXL File Extension

Graph data file created in the GXL (Graph Exchange Language) format, a format used for transferring graphs between software applications; stores the nodes and edges and properties that make up the graph; uses an XML format that allows interoperability between programs.

The GXL format was originally published in 2000. It is now less popularly used than other graph formats such as .GRAPHML, .GML, and .XGMML.