Are All WordPress Themes GPL?

The GPL (GNU General Public License) is a free software license that allows the use, distribution, and modification of software. WordPress is an open source software project released under the GPL.

This means that WordPress is free for you to use, distribute, and modify.

However, not all WordPress themes are released under the GPL. Some themes may be released under a different license, such as the GPL or Creative Commons Attribution-ShareAlike 3.0 License.

If a theme is not released under the GPL, it is not technically illegal for you to use, distribute, and modify the theme. However, using a theme that is not released under the GPL may violate the spirit of the GPL, and may result in legal action being taken against you.