The following licensing provisions apply:
- the mainline GLPK project is free software and is licensed under the GNU General Public License 3 (GPLv3)
- many of the parallel initiatives associated with the mainline GLPK project (for instance, the development of customized IDEs) are also free software projects — please consult these projects individually for details of their licensing
- text and code contained within this Wikibook is automatically covered by both the Creative Commons Attribution/Share-Alike License 3.0 and the GFDL — commercial reuse is thereby permitted under the same terms.
The GNU Project offers comprehensive advice on the compatibility of the GPL license with other software licenses.