"Republicans are on the wrong side of a gender gap" and similar fallacies

[Mr. Morden]

Yeah, this is one of my pet peeves as well.  The "gender gap" is just the differential between how men vote vs. how women vote.  By definition, it doesn't confer either side with an advantage, since all that matters is the total vote.  I think you're right that people are misled by the assumption that men should be considered the "default" group, which is of course nonsense.