Glebe has a percussion group called Offbeat, which uses things like trash cans, brooms, chalk dusters, and water barrels as instruments.

The construction of "Ottawa Collegiate Institute, Glebe Building" was a slow process, and classes began in 1922 before it was complete, causing some inconveniences for students.

In the middle of the meal, a food fight erupted between the two groups and only an enraged principal could persuade students to stop.

[citation needed] Students at Glebe Collegiate Institute during the 2010-2020 decade would sometimes help set up and take down a temporary dome at a nearby exhibition centre during the winter.

In later years, the aforementioned company would offer to build a turf field and another temporary dome on Glebe property for free, but the school board refused to give approval and construction was never started.

On October 19, 2017, Glebe Collegiate Institute went into lockdown after a gun and a bullet were found on school grounds.

[5] Glebe Collegiate Institute's Reach for the Top trivia team won the 2020-2021 and 2021-2022 national championships.

Glebe has a full-size playing field that is used for a variety of high school sports like soccer, football, and baseball.