It follows four days of police and Oranga Tamariki interviews over a range of alleged offending last week.
The multi-agency investigation continues into a range of alleged offences.
The community has been the subject of allegations of sexual abuse and abusing workers' rights.
Sources say they could be there for some time as they conduct enquiries.
One Gloriavale leader allegedly told parents older students molesting younger ones was "no worse than stealing an apple".
"There were parents not told that things were happening with their children, and that's just really sad."
"It appears that the principal had knowledge of this, had been signing this guy off as safe."
There have been claims by former residents of abuse, exploitation, poor education and health services.
The Gloriavale Leavers' Support Trust started the petition this week.