G was born in the town of Tarn Taran, near Amritsar in Punjab, India to Avtar and Arjinder Chahal. In 1985, his parents received a visa for America through a lottery-based system in India, and the following year, when he was four, the family settled in San Jose, California. His parents had arrived with only $25 to their name, and they struggled at menial jobs to make a future for their four children.
