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GraphicsMagick provides a powerful command line utility which may be used to access all GraphicsMagick functions. Gm uses a consistent set of options (see options documentation). GraphicsMagick provides access to major command modes via a single executable command-line program called 'gm'; for example, to use the "convert" mode, type "gm convert ...". The available command modes and links to their documentation are shown in the following table:
| GM Command Mode | Description | 
|---|---|
| animate a sequence of images | |
| composite images together | |
| execute a Magick Scripting Language (MSL) XML script | |
| compare two images using statistics and/or visual differencing | |
| convert an image or sequence of images | |
| display an image on a workstation running X | |
| describe an image or image sequence | |
| capture an application or X server screen | |
| transform an image or sequence of images | |
| create a composite image (in a grid) from separate images | 
The gm utility makes it easy to perform complex image processing operations using a single command. It may be invoked from scripts, or from other programs in order to automate the processing of thousands of images.
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