Yes, it is possible to take a stadium tour.
There are guided tours in English and French that take you to all the places where a normal visitor doesn't have access to during the French Open.
There is also a Roland garros Museum where a permanent exhibition showcases the sport, right from 1897. There are interviews, a multimedia experience, old souvenirs and other knick-knacks on display. Temporary exhibitions are subject to change.
For reservations, email firstname.lastname@example.org