[Android] How do you set gyro start orientation

I'm new to using unity and was working through using the android and building it to a nexus 7.

I have made a sample game to look around a room with the gyroscope. It currently works as intended except if I have the tablet facing down towards the ground ,when i run the unity app of it, the orientation is off by 90 degrees and If i don't start it exactly vertical it will be off by varying amounts.

So How do you make that the game will start in a fixed position and not from where the tablet is facing.

Any help would be appreciated.