With injuries limiting Gul's test cricket participation, he made a distinct change to his bowling set-up, making a focus on bowling in the late overs of T20. He got his opportunity with the absence of Shoaib Akhtar and Abdul Razzaq in the 2007 ICC World Twenty20 held in South Africa. He bowled from the 13th over onwards and finished the tournament with 13 wickets, becoming the leading wicket taker ahead of Shahid Afridi and RP Singh.
In the 2009 ICC World Twenty20, he performed well, earning the mantle from at least one pundit of "the outstanding seam bowler of the World Twenty20"
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His five-wicket haul for just six runs, when Pakistan defeated New Zealand, won especial acclaim. The spell made him the first bowler in history to take a five wickets in a Twenty20 international, and he held the record of best T20 bowling figure until 8 August 2011, when surpassed by Ajantha Mendis (6/16).
Mutterings were made about a possible correlation between ball tampering and the exorbitant amounts of reverse-swing he was able to extract, but he denied them categorically: "whenever an Asian bowler performs and uses the reverse-swing, the Western cricketing countries raise the issue of ball-tampering against them.
He was also part of the Pakistan team that lifted the trophy at Lord's while also finishing as the leading wicket taker of the tournament for the second consecutive time.
He gained a lot of wickets bowled, in particular with late reverse swinging yorkers, which dip late to slide under the bat and leave little room for batsmen to maneuver the ball. Consequently he has also an excellent economy rate in this format of the game.
In February 2008, Gul signed with the Indian Premier League and was drafted by Shahrukh Khan's Kolkata Knight Riders franchise for US $150,000.[
