If coming by public transit (MBTA): The route that will bring you closest to the GSU is to take the Green Line “B” to the Boston University Central stop (right across the street from the Union). Alternatively, Bus #57 will also let you off right by the GSU (heading east, at the Commonwealth Ave & Carlton St stop; heading west, at the Commonwealth Ave & University Rd stop). Information about the MBTA is accessible here.
If driving: Please consult BU Parking for lot prices, locations, and hours. Nearby/recommended parking lots are the Granby Lot (overflow to the Kenmore/Agganis Arena Lots) for Thursday-Saturday and the Agganis Arena Lot for Sunday.