Bidyashagar Singh's 23rd minute strike did little to stop the Gokulam juggernaut as goals by Sharif Mohamed (69th), Emil Benny (74th), Dennis Antwi (77th) and Mohammad Rashid (90+6) handed them the trophy.
I-League 2021: Gokulam Kerala, TRAU and Churchill in race for title; three front-runners for season's top-scorer
The title could very well be decided by the last kick of the championship, with two matches featuring the three sides set to to be held simultaneously on Saturday.
A Bidyashagar Singh brace, coupled with strikes by Mayosing, Komron Tursunov, and Chanso Horam led Nandakumar Singh's men to a win after Harsh Patre's magical free-kick had reduced the deficit for the Arrows.
TRAU have been the dark horses of the season so far. The team from Manipur is undefeated in the league and has grabbed seven points from five matches, albeit winning only once.
Despite the draw, Churchill managed to maintain their position at the top of the I-League standings with 11 points from five matches. TRAU are second in the standings with seven points from five games.
Chennai captain Charles Anandraj was sent off with a little over a quarter of an hour left, after receiving a second yellow card, to compound Chennai's worries.
Durand Cup 2019: East Bengal first team to seal semi-final berth; FC Goa, Gokulam Kerala win to remain in hunt
Gokulam Kerala's Trinidad and Tobago playmaker Marcus Joseph once again did the maximum damage, striking a double (43rd, 87th) while Shibil Muhammed scored in the 56th minute to fashion a 3-0 win over Indian Airforce at the Sailen Manna Stadium in Howrah