Chicoine, it is a normal side platform station, built in tunnel with a transept, ticket hall, and access at each end.

There are several shops and services on the mezzanine (where the ticket booth and the turnstiles are located) of the Guy-exit side of the station, including a Tim Hortons, a Chinese restaurant (Monsieur Gao), a "Belle Pizza", an Asian pastry shop (Cocobun), a hair salon, a cyber cafe, shoe store and another small cafe.

The station platforms feature the MétroVision information screens which displays news, commercials, and the amount of time left until the next train arrives.

As of April 7, 2010, all of Concordia University's main buildings are connected through a system of underground passages leading to the Guy–Concordia station.

This major tunnel is 396 feet long and lined with ceramic tiles, with display panels for added visual interest.

[6] In March 2012, the St-Mathieu exit of the station underwent renovation work that included new flooring, ceilings, walls, lighting, as well as sprinkler and electrical systems.