In June 2020, students complained that posters they had put up promoting the Black Lives Matter movement were removed without adequate explanation.

The incident followed similar complaints at two other New Zealand schools, where students had alleged racist motivations for removing posters.

[6] Christchurch Girls' High School, known to many as Girls' High or CGHS, provides boarding facilities for 95 students from years 9 to 13 at Acland House, located 20–30 minutes walk away from school.

[7] The February 2011 Christchurch earthquake had a large impact on the school: it caused extensive damage to the current site;[8] the old Cranmer Centre site was damaged so badly that it was later demolished – and the school's principal at the time, Prue Taylor, lost her husband Brian in the CTV Building collapse.

[9] The current principal is Helen Armstrong, who was appointed the role in November 2023 and formally began acting in February 2024.