What is the name of Rory’s half-sister in Gilmore Girls?

Rory’s half-sister is Gigi Hayden. Gigi is the daughter of Christopher Hayden, Rory’s father, and Sherry Tinsdale.

Gigi’s arrival changes Christopher’s relationship with Lorelai and Rory. Christopher becomes focused on his new family responsibilities, while Lorelai remains connected to him through their long and complicated history.

Gigi is Rory’s paternal half-sister, meaning they share Christopher as a biological parent but have different mothers. She is distinct from April Nardini, who becomes connected to Rory through Luke Danes and is sometimes described as Rory’s step-sister in character listings.

The name Gigi is a nickname rather than the longer name Georgia. The series uses both forms in relation to Christopher and Sherry’s daughter, but Gigi is the canonical name most associated with the character.