Born and raised in Los Angeles, Gigi, the oldest of three, started her modeling career at age 2 when she was discovered by Paul Maricano of Guess and began modeling for Baby Guess. She later put modeling on hold so she could focus on school but resumed her career in 2011 after signing with IMG Models. She has since appeared in ads for Guess and Tom Ford among others. She has also appeared in Sports Illustrated's swimsuit issue. She has also walked in runway shows for designers like Jeremy Scott and Desigual.
Besides her work as a model, Gigi has appeared in several music videos including Taylor's Bad Blood music video, in which she played a character named Slay-Z. She also appears in the music video for Calvin Harris's hit single "How Deep is Your Love". She even got to co-direct the music video for "Cake By the Ocean" by her ex-boyfriend Joe Jonas and his band, DNCE. She later appeared in singer Zayn Malik's video for his single, "Pillowtalk".
Gigi dated singer Cody Simpson off and on for nearly two years until 2015. She later dated one of Taylor's exes, singer Joe Jonas. She has been dating former One Direction singer Zayn Malik since November 2015. On March 2018 Gigi and Zayn mutually announced their break up but later got back together. They broke up again in November 2018.
Friendship with TaylorTaylor and Gigi have mutual friends in common including actress Jaime King and Selena Gomez among others. The two have been seen hiking together in Los Angeles, and Gigi even joined Taylor onstage at her concert in Detriot. Gigi even spent the 4th of July with Taylor and their friends at her Rhode Island home.
- Gigi's mother, former model Yolanda Foster, used to appear on the popular Bravo reality show The Real Housewives of Beverly Hills.