People (remember there are tens of millions of people voting, not just you) primarily make their Presidential choice based on likeability.
Gingrich had a massive gender gap WITHIN the Republican primary electorate - Romney has a big gap NOW in the general electorate, but Gingrich's would have been titanic.
Gingrich would have been savaged by the media ten times worse, and the all of the "asking for a divorce/open relationship over the phone" stuff would have annihilated him in the general far worse than it ended up doing in the primaries.
But hey, if you want to live in a delusional fantasy world that Gingrich would overcome that with a few debate zingers, go right ahead.
Yes, Gingrich would have been Dead Man Talking.
Bill Clinton would win in a landslide if he were allowed to run again, and what he did is 10 times worse than anything Gingrich supposedly did.
That issue was a red herring to try and derail Gingrich and push through the moderate insider (sure to lose) pick Romney.