Gaia is the mother of the Titans (in addition to several other gods and creatures), the wife and consort of Uranus, the mother of Pontos and the grandmother of the gods of Olympus.
Gaia was formed from Nothingness, and represents the Earth itself. After she was born, she gave birth to her son and future husband, Uranus, the representation of the sky and her physical equal. The couple had several children, the first of whom were the Titans. Gaia afterwards gave birth to the Cyclopses (creatures with only one eye) and the Hekatonkhieres (giant creatures with 100 arms and 50 heads each). However, feeling them too ugly and too powerful, Uranus trapped these last children inside Tartarus. However, he spared the Titans, which would be his undoing. Infuriated at the cruelty towards her children, Gaia created the Soma for the Titans, and encouraged her youngest son Kronos to ambush his father with Megas Drepanon to kill him. Kronos did so, but as he fell Uranus cursed Kronos to suffer the same fate, which would be fulfilled at the hands of Kronos’s youngest child, Zeus, during the events of Titanomachy.
She is also the mother of Pontos. He in turn is the father of their daughter, the sea Titaness Eurybia.
At some point, Gaia ended up being sealed in the Gea Altar.
War of the Gold Saints against the Titans
The imprisoned Gaia is shown as the force behind the deity Pontos after his resurrection. Pontos in turn resurrects the Titans. Pontos, Prometheus and Mnemosyne remain loyal to her and manipulate the Titans for her sake.