Zimbabwe: Liam Roche (C), Robert Chimhinya, Jonathan Connolly, Alistair Frost, Taun Harrison, Wesley Madhevere, Tanunurwa Makoni, Donald Mlambo, Tinashe Nenhunzi, Nkosilatu Nunu, Kieran Robinson, Jayden Schadendorf and Milton Shumba.
Australia thumped Papua New Guinea by 311 runs as the former champions progressed to the Super League quarterfinals from Group B, alongside topper India.
Gill, later adjudged "Player of the Match", fittingly hit the winning boundary, a straight drive for four.
Zimbabwe batsmen seemed clueless against left-arm spinners Anukul Roy (4/20) and Abhishek Sharma (2/22) and folded up for 154 in 48.1 overs.
Param Uppal made 61 runs with the help of five boundaries and two maximums.
India chased down the small target with ridiculous ease as Harvik Desai (56 not out off 73) and Shubman Gill (90 not out off 59) took the team home in just 21.4 overs. Only one batsman scored in double figures.
James Tau, Semo Kamea, Leke Morea and Daure Aiga grabbed two wickets each for PNG.
India hammered Zimbabwe by 10 wickets at Mount Maunganui.
Australia pace bowler Xavier Bartlett did most of the damage with three wickets for 20 runs in seven overs while Will Sutherland and Lloyd Pope picked two wickets apiece. The three-time U-19 World Cup champions made some changes in their batting line up too, with newcomer Harvik Desai asked to open with Shubham Gill in place of the mercurial Prithvi Shaw.
The youngsters, who do not have much List A experience, having played just 5 and 2 matches respectively, were thrust into the side to acclimatize to the pressures that a World Cup encounter entails, in case of an injury to a member later on in the tournament.