[4] From 2008 to 2011, O'Gorman underwent a major addition that added two academic wings, a new chapel, and a new performing arts center.

[5] OGHS was named a No Child Left Behind Blue Ribbon school in 1985, 2005, 2014, and 2021.

[6][7] O'Gorman is a member of the South Dakota High School Activities Association.

[8] They have won the following SDHSAA State Championships:[9] The school fields one competitive show choir, the mixed-gender "Ovation!".

[11] The school hosted the first South Dakota state championship competition in 2016.