G Train

G Train could refer to:

Railway

 * G-Train (Korail), a South Korean tourist train also known as the West Gold Train
 * G (New York City Subway service), a rapid transit service in New York, United States
 * G series (Toronto subway), retired rapid transit cars used in Toronto, Canada
 * G scale, a size of model railroading ranging from 1:19 to 1:32

People

 * the nickname of Fraser Gehrig, former St Kilda Australian rules footballer
 * the nickname of Caitlin Greiser, St Kilda Australian rules footballer