This was India's third gold in the continental tournament. Rathore shot 114 out of 125 to win the junior trap event in a shoot-off.
The 15-year-old has been making steady progress over the years. Nicknamed 'Milo', he won the junior trap shooting title at the National Championships last year.
This is by far his best international performance in a short career, bettering his third-place finish at the Asian Shooting Championships in Almaty last year.
"However the lack of the required entries resulted in the Junior trap event being converted to a Grand prix which eluded Manavaditya of an Asian Championship Gold but with the precision and accuracy that he has showcased I am sure he is not far away from earning many other big international medals for India."
The senior men's trap team finished fourth overall with other members of the team namely Manav and Prithvi Raj Tondaiman shooting 115 and 114 respectively to add to Kynan's tally.