Géraldine was born in Port Gentil, Gabon where she was first introduced to volleyball first. She was introduced to basketball later by her younger brother. At 18 she left Gabon for France in order to continue her studies and eventually to use her sporting qualities. Once in Besançon, France, she tried first to join a volleyball club, but the training schedules clashed with her studies. She then turns to basketball and joined the local club, Besancon then playing in NF2 (3rd division). At the end of the season, when Besançon was relegated to the lower division, she then decided to go to London. After London, she played in different leagues and clubs across Europe.
Between France, England, Italy, and Poland, Géraldine was selected the most valuable player (MVP) in 3 different national leagues. Géraldine Robert is one of the most successful African female basketball players and athletes of her generation and the best basketball player from Gabon. In Africa, the hype of her career was leading the Gabon women, national team, to its peak at the 2015 Women Afrobasket tournament where they reached the ¼ final for the first time.
After playing her last season in the French league in the 2018-2019 season with the Carolo Basket Flames, Géraldine retired from professional basketball.
She founded Yemaly to support basketball development in Gabon. Yemaly has been organizing camps and youth basketball programs for more than 10 years. Géraldine is also the national coordinator for the school and university championship in Gabon and a member of the French President, Emmanuel Macron, Presidential Council for Africa.