Fans camped out overnight to say a final goodbye to the singing star who was hugely popular among the band's fans, and many spent the evening reminiscing about the late singer.
They accompanied Gately's remains home on Friday and the four stayed up all night with Gately at the church as they told fans that 'he didn't like to be alone."
Many fans also made the overnight vigil outside the church, and at around 6 a.m. local time, the four came out of the church to mingle with fans, shake their hands and thank them for their support.
"It is a huge tragedy," Bertie Ahern told RTE outside the church. "I find it very hard. I had endless chat with Ronan before the band came back. He was so glad to get the band back and Stephen was so glad to get the band back, and then this happens a year into it."
Irish singer Tony Kenny, a favorite of Stephen's mother Margaret, sang during the service. Father Declan Blake, who celebrated the funeral mass, remembered Stephen as the the kid who used to teach disco dancing at the church, and said that mourners should grieve with hope.
The remains of Stephen Gately are being taken to Glasnevin Crematorium for a private family service.