He captains Gujarat Titans in the Indian Premier League and plays for Punjab in domestic cricket.

[7] His unbeaten 102 in the semi-final against Pakistan U-19 drew praise from batting greats such as Rahul Dravid, Sachin Tendulkar, VVS Laxman, and Sourav Ganguly.

Gill was appointed as the captain of Gujarat Titans ahead of IPL 2024 after Hardik Pandya was traded to Mumbai Indians.

[13] In 2007, he moved the family to Mohali, near the Punjab Cricket Association Stadium, to facilitate better training opportunities for Gill.

Gill faced U-19 bowlers in the nets, leading Ghavri to request PCA to put him into Punjab's U-14 team.

[26] On 25 December 2018, on the fourth day of the match against Hyderabad in the Ranji Trophy, with Punjab needing 338 runs from 57 overs, Gill scored 148 off 154 balls, almost single-handedly taking his side to victory.

[32] In September 2022, Gill was signed up by Glamorgan as their overseas player for the remainder of the 2022 County Championship season.

[34] In December 2016, Gill was part of the Indian U-19 team for the 2016 ACC Under-19 Asia Cup, where he emerged as the second-highest run-scorer of the tournament, behind teammate Himanshu Rana.

[35] India won the tournament by defeating Sri Lanka U-19 in the final, with Gill scoring 70 runs off 92 balls.

[43][44] Following India's matches in the tournament, the International Cricket Council (ICC) named Gill as the rising star of the squad.

[47] In August 2019, Gill set a record as the youngest Indian batsman to score a double century in a first-class match.

[48] At the age of 19 years and 334 days, he scored 204 runs for India A against West Indies A at the Brian Lara Cricket Academy in Trinidad and Tobago.

[53][54] In the fourth Test at the Gabba, he scored 91 runs off 146 balls, playing a crucial role in India's series win.

[57] Gill was part of the Indian squad for the 2021 ICC World Test Championship final against New Zealand.

[60] In July 2022, during India's tour of West Indies and USA, Gill scored 205 runs in three matches, including a 98 not out in the third ODI.

On 18 January 2023, in the first match of the series against New Zealand, Gill scored a double century, tallying a total of 208 runs.

[75] Gill was part of the Indian squad for the 2023 ICC World Test Championship final against Australia.

[76] During the 2023 India tour of West Indies and USA, Gill was the second-highest run-scorer in the ODI series, behind Ishan Kishan.

[84] In May 2024, he was named as a reserve player in India's squad for the 2024 ICC Men's T20 World Cup tournament.

[88] Gill scored 203 runs in the 2018 season as KKR finished third, losing in Qualifier 2 against Sunrisers Hyderabad.

[89] In March 2019, he was named as one of eight players to watch by the International Cricket Council (ICC) ahead of the 2019 Indian Premier League tournament.

KKR reached the final where Gill would score a half-century, however, the team would ultimately lose to CSK, coming second.

[95] Gill would score 483 runs in 2022, and the Titans would defeat Rajasthan Royals to win the 2022 IPL in their inaugural year.