Once Pandya's exit was sure, 24-year-old opener Gill was an obvious captaincy choice.
Mumbai Indians have traded their all-rounder Cameron Green to RCB in an all cash deal.
If the deal goes through it will possibly be the biggest player trade in IPL history. Neither franchise has yet made any public comment on the trade though.
Bond, who has been associated with MI since 2015, won four IPL trophies as the bowling coach of the team.
Keralite Vishnu came on for Ishan Kishan who suffered a concussion after an accidental collision with teammate Chris Jordan during the GT innings.
Gujarat Titans, who won the IPL title in their debut season last year, will meet four-time champions Chennai Super Kings in Sunday's final.
Kishan suffered a freak injury as he collided with his MI teammate Jordan.
Gill, who brought his third hundred of the season, smashed seven fours and 10 sixes in his blistering knock. Among his 10 sixes, one shot stood out.
Madhwal, an engineer from Uttarakhand, returned sensational figures of 5/5 in 3.3 overs as MI inched one step closer to the IPL summit clash.
LSG omitted attacking wicketkeeper-opener Quinton de Kock from their playing XI and it turned out to be a big blunder.