The FSF separately and specifically grants permission to modify their licenses under certain conditions (change the name and references to GNU, and remove the p

The FSF separately and specifically grants permission to modify their licenses under certain conditions (change the name and references to GNU, and remove the preamble unless you have permission): https://www.gnu.org/licenses/gpl-faq.en.html#ModifyGPL https://www.gnu.org/licenses/gpl-faq.en.html#ModifyGPL