The name Gigi is a girl's name of French origin. Gigi and is often added to lists like Nicknames for Girls and discussed in our forums with posts like "Love, Like, Lose -- Outlandish/Guilty Pleasures edition!".
From the experts:
Like high-kicking amies Coco and Fifi, Gigi has a lot of Gallic spunk but lacks substance. Was chosen for her daughter by designer Cynthia Rowley. While some parents might fashionably use Gigi on its own, we'd recommend lengthening it on the birth certificate to something like Georgiana or Gabrielle.