Pubs in the city shut as a mark of respect and police issued advice to motorists as traffic came to a standstill with cars lining the streets leading to the funeral at St Peter-in-Chains Church in Chequer Road.
Jason, aged 53, was found unconscious and with head injuries outside the Park Social Working Men's Club on Victoria Road, Balby, at 1am on October 29.
Despite the best efforts of the public and paramedics, he was pronounced dead at the scene.
Today’s funeral was followed by his burial at Rose Hill Cemetery.
Three people have been arrested over his death and bailed by detectives.
Officers arrested a 33-year-old woman and a 47-year-old man on the day of the murder and a second man the day after.
A 39-year-old man who was also arrested on suspicion of murder was released with no further action.
1. Jason Gaskin funeral St Peter in Chains at Doncaster
The funeral car makes its way to the chuch. Photo: Dean Atkins
2. Jason Gaskin funeral St Peter in Chains at Doncaster
Mourners gather outside the church. Photo: Dean Atkins
3. Jason Gaskin funeral St Peter in Chains at Doncaster
The pallbearers carry John into church. Photo: Dean Atkins
4. Jason Gaskin funeral St Peter in Chains at Doncaster
Hundreds turned out. Photo: Dean Atkins