There are subtleties, but what I inferred from OP's post was that they modify or extend TinyMCE's code and that they don't want to relicense the modifications.

There are subtleties, but what I inferred from OP's post was that they modify or extend TinyMCE's code and that they don't want to relicense the modifications. If you just use TinyMCE without modification as a non-essential part of a larger whole it should be fine [0]. [0] https://www.gnu.org/licenses/gpl-faq.en.html#GPLInProprietarySystem https://www.gnu.org/licenses/gpl-faq.en.html#GPLInProprietar...