Zanadu would certainly like to produce at a point such as point G1 because it would have more mobile phones and laptops, but this is not possible because the country does not have enough resources. Points G1, G2, and G3 therefore represents scarcity and lies outside the production possibilities curve.
Points on the production possibilities curve (A,B,C,D,E,F) indicate the possible or attainable combinations of laptops and mobile phones and can therefore be regarded as potential output. These points also indicate the boundaries of production.
To reach any point outside the production possibilities curve such as G1 or G2 or G3, Zanadu would need more resources and / or increase the efficiency of its current resources.