From the airport
Montreal's major airport is the Trudeau International Airport to the west of the city. From there, you can take a taxi ($40+) or bus to get downtown. The 747 bus runs 24 hours a day, 365 days a year, and goes directly from the airport to several stops in the city center. The fare of $10 pays for your trip (~30-40 mins), and is valid for the next 24 hours. You will see the vending machines in the airport. You can also pay with exact change on the bus. To go straight to McGill, get off at Union Street (stop #6).
By train
Montreal's main train station, Gare Centrale, is located below the Queen Elizabeth Hotel on the corner of René-Lévesque and Mansfield. It also has an entrance at 895 de la Gauchetière ouest. The station is the major terminus for Canada's VIA Rail trains from Halifax, Toronto, Ottawa, Québec and the Gaspé, as well as U.S. Amtrak trains from Washington and New York. It also provides easy access to the city's subway (the Metro), as it is situated at the Bonaventure station (on the Orange Line of the Metro).
By bus
The terminal for major bus lines is the Gare d'autocars de Montréal, located at 505 de Maisonneuve est, corner of Berri. From the Gare d'autocars de Montréal you can take a taxi or take the Metro (subway), as the Berri-UQAM station is connected to the bus terminal.
By car
There is no on-site parking for the public at McGill's Schulich School of Music or Université de Montréal. Metered street parking is available in the downtown core. For information about getting a McGill University parking permit, visit the McGill Parking website. However, it may be best to leave your car at home if you can avoid it. Montreal has many one way streets and traffic customs you may be unfamiliar with. All street signs will be in French.