File paths look for repo (gazeboSimulation) it should be cloned in catkin_ws/src/
add the following to ~/.bashrc
export GAZEBO_MODEL_PATH=(path to repo)/models:$GAZEBO_MODEL_PATH
export GAZEBO_RESOURCE_PATH=(path to repo):$GAZEBO_RESOURCE_PATH
An example
export GAZEBO_MODEL_PATH=/home/tabor/catkin_ws/src/gazeboSimulation/models:$GAZEBO_MODEL_PATH
export GAZEBO_RESOURCE_PATH=/home/tabor/catkin_ws/src/gazeboSimulation:$GAZEBO_RESOURCE_PATH
Remember to open new terminal or run source ~/.bashrc after adding commands