This Scream Queens Baby Theory Has Pretty Much Been Proven

Gigi gets involved at a very interesting time: when Grace enrolls in school and rushes the sorority. Gigi has already said she had a "traumatic experience in the '90s" that caused her to be stuck there mentally (including her sense of fashion). I think that means she's the sister who is holding the baby when the mother dies. It's possible she took care of the baby as the "Hag on Shady Lane" after she watched Grace's birth and her mother's death on the same night. That could explain why she's at Kappa now . . . and it could make her the killer.