Certainly not in isolation. It measures inequality. If everyone has nothing you get a perfect Gini score. Pakistan, Ukraine, Belarus and Algeria have a lower (better) Gini score than all of the Americas and most of western Europe and Japan. Want to move?

The Gini coefficients published for deeply corrupt countries like Pakistan and Ukraine are almost certainly a total fiction. Much of the real wealth held by the elites in those countries is hidden from official statistics.