No, I don't. Looking back at the reference, the first part of the article did refer to GDP - but that wasn't the part that I was personally referring to, which read:
"Of course, this is only looking at federal taxes, and doesn't reflect state and local taxes, but a USA Today analysis found last year that if we include everything -- federal, state, and local taxes, including income, property, sales, and other taxes -- the percentage of personal income that's paid in taxes is still at its lowest level since 1950.
As Michael Ettlinger, head of economic policy at the Center for American Progress, said at the time, "The idea that taxes are high right now is pretty much nuts."
GDP wasn't a factor in my OP. It is the quote above that was important, the part that pointed out that our personal (and married) tax burdens are lower NOW than at any time since 1950...and Head of Joaquin provided more references showing much the same.