This appears to be a perfect example of a phenomenon known as Flanderization;
...the process through which a complex fictional character's essential traits are oversimplified to the point where they constitute their entire personality, or at least exaggerated while other traits remain, over the course of a serial work
Gizpy (AKA Gspie, AKA Ms. Gsptlsnz) started out in the comics as essentially a female version of Mister Mxyzptlk, a short, but recognisably human-like entity.
Gsptlsnz is portrayed as his bossy girlfriend, again short and relatively ugly.
Superman's Pal, Jimmy Olsen #52 (1961)
DC Comics Presents #97 (1986)
Over time Mxyzptlk became dramatically more gnomelike and Gsptlsnz became more overlty feminine.
JLA #31 (1999)
Until they eventually just started writing her as a sexbomb.
Countdown to Final Crisis #22 (2007)
Superman Adventures 26 (2016)
[Superman Reborn (2017)
Action Comics 1000 (2018)