Deficit spending is considered part of the GDP. Print a quadrillion dollars and we could have thousands of percent GDP growth! Part of the reason that GDP can be a highly misleading metric. The article alludes to this in a pretty amusing way:

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"The U.S. economy grew at an even stronger pace then previously indicated in the third quarter, the product of better-than-expected business investment and stronger government spending.

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Government spending also helped boost the Q3 estimate, rising 5.5% for the July-through-September period. However, consumer spending saw a downward revision, now rising just 3.6%, compared with 4% in the initial estimate."

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