Uranus in Greek Mythology is male, yes.

Uranus was the sky, and Gaia the Earth in Greek Mythology.

Uranus is in Roman mythology, not Greek. His Greek counterpart, Ouranos, was the embodiment of the sky. He was basically the titan version of Zeus.

In Roman mythology Uranus was the god of the Sky; and father of Jupiter.

Uranus was named after the Roman god of the Sky. Uranus was the father of Saturn in Roman mythology, and Cronos in Greek mythology. Uranus and Cronos were considered titans in Greek mythology, while the Romans considered Uranus and Saturn gods.