How did gopal get inside the palace to see the king after he had bought the fish?

Judicial review

Explanation:

The United States Supreme Court reviews laws and decides if they align with the intent of the U.S. Constitution. This is an example of judicial review.

Judicial review, is simply the power that is possessed by the court whereby the actions of the arms of government such as the executive, legislative are checked so that they can be consistent and not deviate from the Constitution of the United States.