Gigi, or just G.
Famous people named Gia:
Reality TV start Gia Allemand; Gia Mantegna, actress and daughter of Joe Mantegna; daughter of reality TV stars Teresa and Joe Giudice; daughter of Matt Damon; daughter of Mario Lopez; late model Gia Carangi; actress Gia Carides
Gia is also a nickname for the name Georgia.
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