What do you think?:
Pay special attention to his use of the term "males" for men. I have found it fairly often to be MRA code for "men." After all, the term "male" refers to all male animals, not just human males. To use it in this context seems highly correlated with the assumption that gender differences are all biological, that traditional gender roles are unavoidable and so on.
In any case, Newt is not worried about women earning less, not at all. From his past:
A January 19, 1995, New York Times article reported on concerns about women in military combat roles that Gingrich had raised while teaching a history course at Georgia's Reinhardt College. The Times reported that Gingrich told his students that "females have biological problems staying in a ditch for 30 days because they get infections, and they don't have upper body strength," and added that men "are basically little piglets; you drop them in a ditch, they roll around in it."
Gingrich reportedly further said that if being in combat "means being on an Aegis class cruiser managing the computer controls for 12 ships and their rockets, a female again may be dramatically better than a male who gets very, very frustrated sitting in a chair all the time because males are biologically driven to go out and hunt giraffes."