Who is known as the Greek god of the earth?

The Greek goddess of Earth is known as Gaia or Gaea. She is considered as Mother Goddess and worshiped in form of a deity by ancient Greeks. She is held in high-esteem in Greek mythology and religion. They believe beginning of life on earth is from Gaia and she is treated as a divine being. It should be noted that Gaia is not actually a god, she is a Titan one of the predecessors of the Greek Gods.