is there any GUI slider in unity like in the following picture?
it doenst have to be 100% same like in the picture
You should be able to do this pretty easily by adding a UI Slider and then manipulating the parameters to have a min=0, max=1, and only use Whole Numbers. You should be able to add a Text UI element (ON/OFF) and layer it under the slider knob so each is hidden when off. Just resize as needed to make it appear like your example…
Here is the documentation:
http://docs.unity3d.com/Manual/script-Slider.html