"There are circumstances where I will run," Gingrich told a news conference before a speech at the University of Mobile.
Earlier this year, in an interview with The Associated Press, Gingrich said, "Anything seems possible."
Asked under what circumstances he would enter the race, Gingrich, 62, said he plans to continue traveling the United States talking about the issues.
"My hope is that five or six candidates are going to jump up, steal all of my ideas, and I will be able to relax and go golf," he said.
The former Georgia congressman said if nobody picks up on the ideas and the country thinks they are significant, a campaign is possible. But he added that's "so far down the road and so much less important than my two grandchildren."