I don't presume to know the mind of God regarding Newt Gingrich. Why do you?
I do know what I've seen of Mr. Gingrich, fallen sinner himself as we all are, and his particular weakness is political posturing, sometimes involving his religious faith.
Would you be nearly so credulous regarding his conversion, if he were not joining your own church?
The Bible tells us that God is all loving and wants everyone to be saved.
“Many are called, but few are chosen.”