No. Basketball players Grant Hill and George Hill are not related. Grant Hill grew up in the Dallas, Texas and Reston, Virginia areas, while George Hill grew up in the Indianapolis, Indiana area.
Grant Hill's parents were ex-NFL player Calvin Hill and Wellesley College graduate Janet Hill, while George Hill was the only child of George Hill, Senior and Tina Hill Woods.
No information could be found showing any connection between their families and they have never said anything about being related in any way. The two players are also 13 years apart in age, with Grant Hill having been born on October 5, 2023 and George Hill's birthday being May 4, 1986.
Both Grant Hill and George Hill have played in the 2013 NBA Playoffs.
Of interest, a new WSJ study finds 48.8% of players are related to an elite athlete—that number is 17.5% for the NFL and 14.5% for MLB. Find out more here.