Ubuntu GNOME is an official Ubuntu flavor, built from the Ubuntu repos and coupled tightly with GNOME Desktop. It is open source and free to use.
We work hard to deliver a refined, user-friendly Ubuntu experience. We're excited for you to try it out, and hope you'll join our community!
The latest long-term release is 16.04 LTS (Xenial Xerus).
The final stable release was 17.04 (Zesty Zapus), but it reached End of Life in January 2018.
Disclaimer: The GNOME logo and GNOME name are registered trademarks or trademarks of GNOME Foundation in the United States or other countries. Ubuntu GNOME is not directly produced, endorsed, or supported by the GNOME Foundation.