angle(0,0, Gamepad.Axis(0,0), Gamepad.Axis(0,1)) is the angle of the left stick.
angle(0,0, Gamepad.Axis(0,2), Gamepad.Axis(0,3)) is the angle of the right stick.
You can then use "System Is Within angle" condition to move the object. For example:
angle(0,0, Gamepad.Axis(0,0), Gamepad.Axis(0,1)) is within 45 degrees of 180 : Sprite simulate control Left.