It was in stark contrast to the treatment given to another American-born Chinese athlete, figure skater Zhu Yi, after she crashed into a wall during a team event.
The Russian team won the competition, with the US taking silver and Japan taking bronze.
Weibo said it had suspended 93 accounts and deleted 300 abusive posts about the Olympian, Beverly Zhu, who was born in California to Chinese parents.
Gu defended Zhu as online criticism erupted. “Making mistakes and facing pressure are all part of sports,” Gu said after her win.
Aside from Gu's decision to represent China, what she and Zhu are doing is fairly common in international sports.
Zhu gave up her American citizenship to compete in Beijing. Gu has never publicly addressed her citizenship, so it is unclear if she has done so..