Since 2014, the code, documentation and data files provided by the GAMGI project are all distributed under the terms of the GPL v3 license, promoted by the Free Software Foundation. A copy of the license is included with all tarball files available from that include source code or documentation.

The GAMGI source code can thus be reused in any software project, as long as the other code is also distributed under the terms of the same GPL license. The same terms apply for the documentation written by the GAMGI project, including web pages, images, FAQs, Helps, Manuals, etc., in all electronic formats.

Contributors are automatically abiding by this legal license when they contribute to the GAMGI project. Changes in the legal framework supporting GAMGI can be made in the future, provided that contributors agree that there is an advantage in doing so, but these modifications can never be retroactive, a condition explicitly imposed by all free licenses.