GDP is the gross income of the United States. The revenue of the federal government doesn't quite have an individual analogue, because it's somewhat arbitrary

GDP is the gross income of the United States. The revenue of the federal government doesn't quite have an individual analogue, because it's somewhat arbitrary (it is effectively a fraction of GDP that can be unilaterally increased or decreased by Congress, though doing so has side effects). If you're trying to make a comparison with an individual, you'd need to come up with such an analogy. Gross income isn't it.