Don't confuse mean with median. Someone earning the mean will be well above the median (i.e. earning more than most people) because the mean is skewed by the very well off.
But you're right, GDP isn't the way to measure, as GDP has been going up more than income. Which means someone is skimming, but that's a different discussion.
Median household income in the U. S. is $56K.
So the person is making the same amount as the median 'household'.