Ubuntu GNOME 16.04 LTS is the latest release of Ubuntu 16.04 official flavors. This release ships with GNOME Shell 3.18 and support the most of GNOME 3.18 packages, powered by Long-term supported Linux kernel series 4.4, Fixes the sharing panel in GNOME Control Center, Support an experimental Wayland session. but it’s not installed by default. If you want to test drive wayland on Ubuntu GNOME you need to install gnome-session-wayland package.
For more details you can refer to Ubuntu GNOME 16.04 LTS Release Notes : https://wiki.ubuntu.com/XenialXerus/R…
Download Ubuntu GNOME 16.04 LTS : https://ubuntugnome.org/download/