The gruesome attack claimed dozens of lives, all of whom were members of the town's small Muslim community, some of whom were as young as 3 years old.
Gang president Sonny Fatu says he and his men will act as guardians for worshipers inside the Jamia Masjid Mosque in Hamilton from now on, so that the congregation can pray in peace during their time of mourning.
He's told Stuff: "We will support and assist our Muslim brothers and sisters for however long they need us."
"We were contacted by a representative who tagged me in and said some of our Muslim brothers and sisters have fears for Friday during their prayer, and the question was posed whether we could be apart of the safety net for them to allow them to pray in peace without fear."
Waikato Muslim Association president Dr Asad Mohsin has stated that the community is appreciative of the pledge of support.
While the gang won't be armed, they will be out in force to ensure there isn't a repeat of Friday's terror attacks at two mosques. Although it's unlikely that such an horrific attack would happen again, the gang will provide added peace of mind and security.
Members of The Waitkato Mongrel Mob were pictured hugging people outside the Hagley College in Christchurch at the same event as Prime Minister Jacinda Ardern. It was a time that the whole community came together in compassion, and it seems that will continue into the foreseeable future.
The gang greeted mourners and appeared to console some of their fellow attendees. After the visit, Ardern traveled to a hospital at which 39 people are being treated from injuries. She also visited Canterbury refugee center and wore a black headscarf during her visit as a mark of respect.
On Saturday, Ms Ardern said that her main goal and focus for the time being was to return the bodies of victims to their families in order to allow them time and space to grieve properly. She also spoke with families who are trying to locate missing relatives after the sickening attack.
As well as speaking with the families of the dead, the Prime Minister spoke to survivors from the attack. The two mosques were full, as the premeditated attacks occurred just after Friday prayers had started.
"This is not the New Zealand they know," she said after the event.
"This is not the New Zealand that has welcomed them and that it is not a reflection of the New Zealand they know, and that sentiment came through very strongly."
While the Christchurch community and the wider world come to grips with what happened, it's so nice to see displays of compassion and solidarity - well done, guys.