See the Software Freedom Law Center's guide: https://softwarefreedom.org/resources/2007/gpl-non-gpl-collaboration.html#x1-40002.2 https://softwarefreedom.org/r

See the Software Freedom Law Center's guide: https://softwarefreedom.org/resources/2007/gpl-non-gpl-collaboration.html#x1-40002.2 https://softwarefreedom.org/resources/2007/gpl-non-gpl-colla... There are multiple examples of how to recopyright MIT-style source under the GPL.