Geography data format created by Galdos Systems and supported by the Open Geospatial Consortium; used by geographers for storing geographical data in a standard interchangeable format.

A GML file is a data output file created by Printed Circuit Board (PCB) CAD tools such as Autodesk EAGLE. It contains layout data for the layer that specifies the hole locations that need to be milled.

Gerber layer files, such as GML, are used by PCB manufacturing machines to create PCB boards. The GML file is an exported version of the PCB layout and is referenced to mill holes in the board. NOTE: The Gerber format was originally developed by Gerber Systems but is now maintained by Ucamco.

File created in the GML (Graph Modeling Language) format, an ASCII text format used for describing graph structures; describes the structure of the graph in a text-based hierarchy and includes the nodes, edges, and attributes that comprise the graph.

The Graph Modeling Language can describe family trees, flowcharts, networks, and other graph structures.