Gul featured in six matches and picked 12 wickets in the only season when Pakistan players played in the IPL.
Green was picked by Kolkata Knight Riders to play in IPL 2020.
The Knights would be severely depleted if the overseas players end up missing the tournament.
Back then, Gill was taking baby steps among the big boys of Indian cricket.
During a meeting in March, most of the franchise spoke in favour of hosting the IPL with foreign players.
All three of Karthik, Russell and Narine had a good laugh during the friendly chat.
Uthappa said that Gambhir brought about a sense of security within the group.
KKR won the IPL twice under Gambhir's leadership.
KKR will also be helping out the needy and underprivileged.
Wednesday marked the eight-year anniversary of KKR's maiden IPL title.