"The investigation found evidence of inappropriate communication in contravention of GSK policy by a single employee. The employee concerned was reprimanded and disciplined as a result," the drugmaker was quoted as saying.
GSK could not be reached immediately outside regular working hours.
Read MoreWhy GSK sales shift is a turning-point for pharma
According to the BBC, one doctor has admitted guilt and has been fined and given a suspended sentence.
GSK, Britain's biggest drugmaker, was accused by Chinese authorities in July of funnelling up to 3 billion yuan ($483 million) to doctors and officials to encourage them to use its medicines in a case that rocked the pharmaceuticals industry.
Follow us on Twitter: @CNBCWorld