Gangjee slotted in five birdies against a bogey to end his campaign with a total of nine-under 279.
Gangjee opened with a birdie and followed it up with two more to make the turn three-under.
On his way back, the Indian continued his fine form to pick up two more strokes but a bogey on the final hole denied him a finish higher up the leaderboard.
Among other Indians in fray, Digvijay Singh was the next best-placed at tied 38th after a one-under 71 today left his overall total at four-under 284.
Anirban Lahiri (71) and Gaganjeet Bhullar (71) were tied for the 44th position with totals of three-under 285.
Padraig Harrington (69) lifted the trophy after his total of 20-under 268 had him three shots clear of the chasing pack. Noh Seung-yul took the second spot with the day's best card of seven-under 65.
