G. K. Vishnu is an Indian cinematographer who predominantly works in the Tamil film industry.

Vishnu married Mahalakshmi on 25 April 2021. Vishnu's brother, Vignesh, a data scientist who encouraged him to take up cinematography as a career.

Vishnu is an computer science engineering graduate. Before venturing into cinematography, he worked as an interface designer. He has assisted T. S. Suresh in Vanakkam Chennai (2013), George C Williams in Theri (2016), Richard M. Nathan and P. S. Vinod.