As of Thursday, May 17th, the federal debt was almost $16 trillion. To be more exact, it was $15,712,823,135,725.84, as provided by the U.S. government's Treasury Direct website.
At the rate that it is increasing, it should break $16 trillion around the election in November.
As to GDP, according to the federal Bureau of Economic Analysis in the Commerce Department, it's at $15.462 trillion (that link is to an Excel spreadsheet at BEA rather than a webpage.)
The U.S. federal debt is already in excess of its GDP.
Thax for the update