On Gilmore Girls, Georgia, the daughter of Christopher and Sherry, is nicknamed Gigi. The name is used as the familiar form of Georgia, so Georgia and Gigi refer to the same character rather than two different children.
Gigi Hayden is born during the show’s third season after Christopher Hayden learns that his recently estranged fiancée, Sherry Tinsdale, is pregnant. Christopher is also Rory Gilmore’s father, making Gigi Rory’s younger half-sister. Gigi’s arrival becomes part of the continuing complications among Christopher, Sherry, Lorelai, and Rory.
The character has relatively little screen time compared with Rory, but she remains part of Christopher’s family story. In Gilmore Girls: A Year in the Life, Gigi is described as living in France. April Nardini is another prominent child in the series, but she is Luke and Anna’s daughter, not Christopher and Sherry’s.