Gia appears at the dance and gets her romantic slow dance with Gavin. Erika takes the stage and gives a vulnerable speech, forcing the school to finally "see" and recognize Gia by making her the honorary prom queen. 💡 The Ending Explained Why did Gia disappear?
Gia's presence was tied to completing her final duties on Earth. By getting her dance with Gavin and successfully repairing her fractured friendship with Erika, she resolved her unfinished business. After the crowd chants her name and awards her the prom queen crown, she transforms into a glowing ball of light and ascends to the afterlife. The Lava Lamp Scene Boo, Bitch - Season 1Eps8
Following her massive internet cancellation and the shocking revelation that her best friend was the one who actually died under the moose, Erika Vu must swiftly grapple with who she has become. Gia appears at the dance and gets her
Erika and Gavin realize that Gia’s "Unfinished Business" (UFB) is getting to go to prom with Gavin. Gia's presence was tied to completing her final
Erika realizes that because Gia is the ghost, only Erika and Gavin (who acts as a spiritual medium) can actually see or interact with Gia's physical form.
Erika is initially denied entry to the dance because of her behavior, but classmate Devon offers her his extra ticket.