Variable name for gyro returns

I’ve been trying to setup a conditional program that adjusts positioning through mixers, yet I’ve been failing to find the correct condition. I’m trying to use the gyro’s feedback as condition to use certain mixers as in " if (roll>rollnoise) use this mixer, else if (roll<-rollnoise) use this mixer, else use this". Yet I can’t find the appropriate variable for the roll (or pitch or yaw for that matter).