How to connect Indoor GPS(beacons) to pixhawk

hi, I have done an autonomous navigation application using SITL framework with gazebo iris model and controlled using mavros. I have the plan to do this same on using real quadrotor. In simulation Gazebo itself is providing simulated GPS co-ordinates, using this i have written a rospy script to move quadrotor inside the gazebo. But in real time, I planned to do the same navigation application using real quadrotor in indoor environment. For this. I have bought indoor GPS(Marvelmind robotics), but I’m struggling to interface this indoor GPS with pixhawk and getting pose values. I’m new to this concept can any please help me to take this project forward.