GPL stands for GNU Public License, a license written by the Free Software Foundation. The GNU Public License gives you the freedom to take any piece of GPL-licensed work, change it, and release it for yourself, either for personal, public or commercial use. It’s one of the guiding principles of WordPress and something we believe strongly in ourselves.
PixelPetal Projects
All the projects owned by PixelPetal are released under GPL license (Version 3, 29 June 2007).