The GBR file extension is used by a free graphics editor called Gimp. GBR files are used to store information about the properties of brushes used in the program. These can be data that was pre-installed when uploading the program to the system as well as those that were defined by the user. GBR files are stored in a subdirectory called brushers by default.

Gimp is software distributed under the GNU license developed by The GIMP Team.