Over 800 people packed into Wellington Cathedral of St Paul for his funeral.
King had been involved in some of New Zealand’s most high-profile cases of recent times, including defending Ewen Macdonald against a charge of killing his brother-in-law Scott Guy, as well defending the likes of Scott Watson, John Barlow and Clayton Weatherston.
The 43-year-old was found dead by his car in Newlands at the weekend.
MP Tony Ryall said King’s death was a great loss to New Zealand, while Justice William Young said he was part of a rare group of trial lawyers who were successful in the court of appeal, and had an obvious empathy for victims of crime.
His father Jeff said said his son was keen on sport and loved collecting watches.
“He always had friends through all the facets of his life who were really special to him,” Fairfax NZ reported.
“He moved on and got new friends, but he never left those friends behind.
“I can’t remember Greg making a poor choice until last Friday.
“I want to thank you for being my son Greg.”
His mother Jennifer said: “Greg was a wonderful son and I’m privileged to be his mum. Rest in peace.”
Among the hundreds of mourners was singer-songwriter Brooke Fraser – who is the daughter of King’s close friend, former All Black Bernie Fraser.
Also attending were King’s junior Liam Collins, Sir Robert Jones, former TVNZ boss Ian Fraser, MPs Nick Smith and Simon Power, Crown prosecutor Simon Moore and Labour MP Trevor Mallard.
Other mourners included Police Association president Greg O’Connor and a number of police staff including Detective Inspector Darrin Thomson and Senior Sergeant Mike Oxnam.
Judges Bruce Davidson and Peter Hobbs, Sensible Sentencing Trust founder Garth McVicar and Lawyer Barry Hart were also there.