Synchronization of the virtual game world with the real world

Hello, I am developing a game that is essentially similar to Laser Tag.
The problem is that the players in the virtual world are not in the same place as they are in the real place.
To solve this problem, I need rotation data relative to the real world.
I could get this with a magnetometer or gyroscope, but all my attempts to get this data have failed.
Does anyone know how to solve this.

Sorry for google translate

Thank you in advance!