Cocos2d can take rotations more than 360. But if your going left and right then its a bit more complicated than just checking if sprite. Rotation == 1080 .
If the rotation is happening on your touchesMoved method then what you should do is that you should record your highest rotation (rotation in right maybe) and lowest rotation (the other way) and then the difference should be bigger than 360*3. So add 2 class vars to your G layer float maxRot,minRot.
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