GNU General Public License
Can I use GNU General Public License?
Preamble. The GNU General Public License is a free, copyleft license for software and other kinds of works. ... We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
The GNU General Public License v3.0
Is GNU license free for commercial use?
Software under the GPL may be run for all purposes, including commercial purposes and even as a tool for creating proprietary software, such as when using GPL-licensed compilers. Users or companies who distribute GPL-licensed works (e.g. software), may charge a fee for copies or give them free of charge.
GNU General Public License - Wikipedia
The GPL is a free software license, and therefore it permits people to use and even redistribute the software without being required to pay anyone a fee for doing so. You can charge people a fee to get a copy from you. You can't require people to pay you when they get a copy from someone else.
Frequently Asked Questions about the GNU Licenses
What are the key terms of the GNU General Public License?
There are two main terms to the license. Both apply to giving the program away or selling it. A copy of the source code or written instructions about how to get a copy must be included with the software. If the software is able to be downloaded from the internet, the source code must also be available for downloading.
GNU General Public License - Simple English Wikipedia, the free ...