GECCO is licensed under the GNU General Public License. This license may be found in the file gpl.txt, or on the GNU Project's WWW pages at http://www.gnu.org. To learn what this license is all about without having to read 3000 words of legal text, visit http://www.gnu.org/copyleft/gpl-faq.html. GECCO is not a part of the GNU Project. We just use their license because it suits our needs, and because we think that free software is such a neat idea.