Many people wonder about how to make the kk2 Gimbal work. It's very simple, plug your servo's Into Motor 7 (ROLL) and motor 8 (PITCH) pins on the kk2 (here’s a pic to help you locate the right pins) be sure you have the signal wire facing left (towards the screen).
then in the gimbal settings, change the roll and pitch gains depending how your servo is mounted, positive number for normal and negative for reversing the servo (probably will be in the negatives around -500). The numbers with be different for everyone so it just takes a little testing to get it right. Use the Off-set to center your servos so the camera is level when the kk2 is level. For using the gimbal the motors MUST BE ARMED AND MOTORS SPINNING! Hopefully this helped, It is very simple and easy to use. just be sure to use servos for the gimbal, if you want a brushless gimbal you would need another gimbal board that can handle the brushless motors.
here's what you should have when finished!