The ROS Wiki is for ROS 1. Are you using ROS 2 (Humble, Iron, or Rolling)? Check out the ROS 2 Project DocumentationPackage specific documentation can be found on index.ros.org
Please see this Gazebo tutorial for an example usage.
Wiki: gazebo_worlds/Tutorials (last edited 2011-01-17 16:48:34 by nkoenig)