Grandmothers Against Detention of Refugee Children was first established in Melbourne in 2014 and is a large and vibrant group in Victoria.

The NSW Grandmothers Against the Detention of Refugee Children (GADRC - Sydney) was established in February 2015 when Gaby Judd got some friends together and, with support from the Victorian Grandmothers, established an active and ever growing Sydney group, now rapidly spreading to other parts of NSW. October 2019 renamed Grandmothers for Refugees NSW.

The devastating psychological impacts of detention on children are well known, and have been widely discussed for more than a decade. No one can reasonably argue that a locked detention facility is a suitable place for a child, particularly one who has already been damaged by conflict, war or persecution.
— Refugee Council of Australia, Media Release 2 April 2014
The impacts of detention can persist long after the child has left the detention environment. Mental health experts report that closed detention has ‘undeniable immediate and long-term mental health impacts on asylum-seeking children and their families’. Child psychiatrists who work with children after their release have reported that recovery can occur in some cases, but that in others, mental health effects may be prolonged.
— The Forgotten Children: National Inquiry into Children in Immigration Detention (2014)