Gia Mannetti, played by Rumer Willis, is a recurring character seen in 90210, the fourth series of the Beverly Hills, 90210 continuity. She has appeared in 10 episodes.

Gia worked on the West Beverly Blaze with fellow student Navid Shirazi, a reporter. She later bumped into Adrianna at her Alcoholics Anonymous meetings, which began a friendship between them. She also met Navid's ex-girlfriend, Adrianna Tate-Duncan. While at a party, Adrianna kissed Gia to make Gia's ex-girlfriend jealous. This led to Gia telling Adrianna that she had developed feelings for her. Adrianna and Gia had an argument because of Adrianna inviting Navid to a party. Laurel Copper, who signs Adrianna to her music label, told Adrianna to follow her heart. Adrianna later arrived at Gia's place to fin

d out that Gia had slept with her ex-girlfriend Alex, leading Adrianna to break up with Gia.