At this age, Son Gohan was only shown for few minutes. It wasn`t really shown how old he was during this age in DBZ. He was also first introduced as an adult at this age. His best friend was future Trunks who`s stronger than the present Trunks. Son Gohan was also again murdered by the eveil androids known as 17, and 18. He sacrificed his life for the future Trunks, and gave him his Z sword