He was 82.
Gill breathed his last at 2:55 PM at the Sir Ganga Ram Hospital.
The former Director General of Police (DGP) of Punjab was admitted to the hospital on May 18 under the care of Dr D S Rana, head of the department of nephrology.
"He was suffering from end stage kidney failure and significant ischemic heart disease. Gill had been recovering from peritonitis but died of a sudden cardiac arrest caused by cardiac arrhythmia," Dr Rana said.