@lightweight @conservancy The original author of a work has unlimited rights, including the right to license as they see fit to different groups. The developer of a GPLed program is not bound by the GPL and can combine the GPL code with non-GPL code and distribute it under a non-GPL license.
This would be a problem if you mean to accept contributions, as those contributions would be GPL and not your work, unless you make contributors sign a CLA that assigns copyright of the contributions to you