Gazebo is a robot simulator that offers the ability to accurately and efficiently simulate populations of robots in complex indoor and outdoor environments. Gazebo makes it possible to rapidly test algorithms, design robots, perform regression testing, and train AI system using realistic scenarios and has become one of the primary tools used in the ROS community. Following the first COMMANDIA Tutorial on ROS, on November 25, 2019 a tutorial on Gazebo was held on SIGMA Clermont with simultaneous streaming to University of Coimbra, University of Zaragoza, INESCOP and University of Alicante.