1. An information handling system having a free space gesture detection system comprising: a housing; a camera mounted in the housing and oriented to detect gestures by a user in a gesture detection zone adjacent to the information handling system; a free space gesture detection system executing instructions on a processor determining available gesture commands for a software application operating on the information handling system; the free space gesture detection system detecting gestures in a virtual gesture detection plane, the virtual gesture detection plane calibrated to a location of a user's hand on a location and tilt angle of an assigned virtual working surface; and the processor accessing a gesture database and rating the detected gestures in the virtual gesture detection plane to correspond to a gesture classification.