Gu Yu (born June 12, 1983) is a Chinese amateur boxer who qualified for the 2008 Olympics in his native country at Bantamweight 54 kg. He is from Liaoning.
At the Asian Games 2006 the southpaw was upset in the first round. At the 2007 world championships he reached the quarter finals where he lost to Joe Murray.
In the 2008 Olympics, Gu was able to avenge his defeat to Murray by beating him convincingly.
In 2009 he again reached the quarterfinal at the world championships, losing to Irish boxer John Nevin.