GPX
GPX may refer to:

Science and technology
Glutathione peroxidase (GPx), an enzyme family
GPX Exchange Format, for GPS data (released 2002)
Kawasaki Ninja GPX-250R, a motorcycle model (released 1986)

Other uses
Gautampura Road railway station, Ujjain, Madhya Pradesh, India
GP Strategies Corporation, an American consulting firm (NYSE ticker:GPX)