What is GPL?
This issue can be a hairy one in this community, so I’ll try and speak in the most generally acceptable and agreeable terms I can, in hopes of avoiding anything too crazy and heated in the comments. GPL stands for “General Public License”, an open source license used for releasing digital content, like software. WordPress is released under this license, and means you can do pretty much whatever you want with it. While I’m sure it’s greatly appreciated by WordPress developers for users to give credit to the software system they are using (often in the footer), it is not necessary. One of the beautiful parts of the GPL license is how it is free of the licensing requirements of much software.
