With this win, India clinched the reciprocal five-match series 3-0. The third match was abandoned due to rain.
Put in to bat, India scored a mammoth 384 for seven with Gamvit blasting 86 off 44 balls with 10 boundaries and two sixes. Naik made a similarly explosive 82 off 42 balls with the help of 12 fours and one six to take India to the huge total in the stipulated 35 overs at the Bhagat Singh College grounds.
Ashish Negi (61) and Ketal Patel (38 not out) were the other major contributors. For Pakistan, Mohammad Shahbaz took three wickets while Masood Jan and Pakistan skipper Sultan Syed Shah took two wickets each.
Pakistan made a gallant chase but were all out for 328 in 34.3 overs.
Adnan Ahmed emerged as the top scorer with a 54-ball 76 while Tariq Samuel, Mohammad Waqar and Ashraf Bhatt came up with useful knocks.
Among the Indian bowlers, Dinesh Kumar claimed 2 for 56. He was ably supported by Subhash Boya and Negi who picked a wicket each.
Sports minister Sunil Dutt, who was the chief guest, presented the Man of the Match award to Naik.