FactCheck.org explains how and why this is a lie:
Newt’s Faulty Food-Stamp Claim
The former speaker made that claim Jan. 16 in a Republican debate in Myrtle Beach, S.C., and his campaign organization quickly inserted the snippet in a new 30-second TV ad that began running Jan. 18 in South Carolina.
Gingrich would have been correct to say the number now on food aid is historically high. The number stood at 46,224,722 persons as of October, the most recent month on record. And it’s also true that the number has risen sharply since Obama took office.
The economic downturn began in December 2007. In the 12 months before Obama was sworn in, 4.4 million were added to the rolls, triple the 1.4 million added in 2007.