In Windows XP, you can typically find the Device Manager by RIGHT-CLICKING on My Computer then selecting Manage. Your Ross-Tech USB Interface should be under Universal Serial Bus (USB) Controllers or under Other Devices. If it's there, Right-Click it and then select Update Driver . Then you can start at Step 4 in the instructions below.
For ROS 1, see ROS integration overview. Gazebo is a stand-alone application which can be used independently of ROS or ROS 2. The integration of Gazebo with either ROS version is done through a set of packages called gazebo_ros_pkgs . These packages provide a bridge between Gazebo's C++ API and transport system, and ROS 2 messages and services.