Giovanna Elisa Millana Day (born June 13, 1998) is an American professional volleyball player who plays for the Petro Gazz Angels of the Premier Volleyball League in the Philippines.
Hailing from Romeo, Michigan, Gia Day was born on June 13, 1998 with Rosario and Gina Milana as her parents. She has four younger sisters. She attended Romeo High School and later the University of Maryland and Baylor University.
Day played in the U.S. National Collegiate Athletic Association (NCAA) for the Maryland Terrapins and the Baylor Bears.
Prior to the start of the COVID-19 pandemic, Day started her professional career in France where she played for Pays d'Aix Venelles in the LNV Ligue A Féminine for the 2020âÂÂ21 season.
In 2021, Day moved to Puerto Rico to join Sanjuaneras de la Capital before transferring to Italy to play for Libertas Martignacco in the Italian Serie A2 for the 2021âÂÂ22 season. She remained in the Seria A2 but moved to Talmassons for the next season.
Day's career shifted to Asia when she joined Red Sparks in the South Korean V-League, playing alongside fellow foreign player and friend Megawati Hangestri Pertiwi. Their team finished third place in the 2023âÂÂ24 season. The duo moved to Megawati's home nation of Indonesia to play in the Proliga in 2024. However Day joined a different team than Megawati suiting up for Jakarta Pertamina Enduro.
Day played in the United States for LOVB Atlanta in the League One Volleyball (LOVB) and in the Athletes Unlimited Pro League.
In April 2025, Day was brought in by the Petro Gazz Angels as an import for their upcoming stint at the 2025 AVC Women's Volleyball Champions League.
Gia is married to Daniel Day since 2021. She is of Canadian and Italian descent. She can speak in Italian and French.