The GNU License (General Public License) is a widely-used free software license that guarantees end users the freedom to run, study, share and modify the software. The GPL was first published in 1989 by Richard Stallman, the Free Software Foundation (FSF) founder.
The GPL is considered a “copyleft” license, meaning that any derivative works must be released under the same or a compatible license as the original software. This ensures that the software and its derivatives remain free and open-source.
The GPL is often used for open-source software, including popular programs such as the Linux operating system, the Apache web server, and the MySQL database.
The GPL is divided into two versions: GPLv2 and GPLv3. The GPLv2 license is the most widely-used open-source license and is compatible with many other open-source licenses. GPLv3, on the other hand, was released in 2007 and addressed some issues that have arisen since the release of GPLv2.
Also, See: Gatsby