Gia Matteo is the architect recommended by Elliot Grey to design Anastasia and Christian Grey's future home near the coast in Seattle. She had a short fling with Elliot Grey, Christian's adoptive older brother, last year before Elliot met Katherine "Kate" Kavanagh, his wife.
Gia is known to be the "well-groomed-sexual-predator" by Anastasia nee Steele Grey, due to her secretive seduction towards Christian Grey, her husband. During their meeting in Christian's apartment in Escala, Ana had a word with Gia about firing her if she does not stop flirting with her husband. Eventually, Gia, backed off nevously, as she might loose this big break for being the recommended architect for the rich newly wedded couple.