Cube on space!

Hello, I want to send a balloon to space for hobby, I want to use pixhawk cube orange for data saving and transferring information to the ground station. I think RFD900X as a telemetry module. it has an average range of 50-80 km. With some antennas, this value goes up to 150km. but there are a few things that stuck to me. Can I use normal gps as a gps (like here3) All equipment is resistant to cold but I am thinking of making insulation in addition to this, would this be a problem?