Typically the licenses listed for the project are that of the project itself, and not of dependencies.
GNU GPL V3
This project is a standard open source project... So let's use a standard open source licence.
Can't read the url [http://www.gnu.org/licenses/gpl-3.0.html] : Server returned HTTP response code: 504 for URL: http://www.gnu.org/licenses/gpl-3.0.html