Hi all:
The stable repository packages.osrfoundation.org now hosts the ROS Lunar wrappers binaries for the latest release of Gazebo: gazebo8. This new version of the wrappers joins the Kinetic gazebo8 packages. Both are only available on Ubuntu Xenial since it is the only common platform supported by ROS and gazebo8.
Before using this alternative version of Gazebo in Lunar or Kinetic, please read carefully the documentation:
http://gazebosim.org/tutorials/?tut=ros_wrapper_versions
Enjoy.