Geminus was the son of Gaius Servilius Geminus, a Roman magistrate. He was a member of gens Servilia, a patrician family.

In 212 BC Geminus was sent to Etruria to buy grain for the troops of the Roman garrison in Tarentum, then besieged by Hannibal. He successfully penetrated the city and delivered supplies. In 210 BC he was elected Pontifex in place of Titus Otacilius Crassus and in 209 BC was chosen as Aedile. He was selected to serve as magister equitum, while exercising his position as Aedile, under dictator Titus Manlius Torquatus. In 206 BC he became praetor and obtained Sicily as a province.^[1]

Geminus was elected consul, alongside Gnaeus Servilius Caepio, in 203 BC, and obtained Etruria as a province. From there he went to Cisalpine Gaul where his father of the same name was held as a prisoner of war since 218 BC. In 202 BC Geminus was named Dictator by his brother Marcus Servilius Pulex Geminus to hold elections. He was the last person to hold that position until Lucius Cornelius Sulla in 82 or 81 BC. In 201 BC he served as one of Decemviri responsible for the distribution of land among veterans who fought with Scipio Africanus. In 183 BC Geminus was elected Pontifex Maximus, replacing Publius Licinius Crassus Dives.

• Friedrich Münzer: Servilius 60. In: Realencyclopädie der Classischen Altertumswissenschaft (RE). Band II A,2, Stuttgart 1923, Sp. 1792–1794.
• Smith, William, ed. (1870). "Geminus, Gaius Servilius" . Dictionary of Greek and Roman Biography and Mythology. Vol. 3. p. 793b.