GMC "New Look"
http://www.imcdb.org/vehicle.php?id=329224

1989 New Flyer D40
http://www.imcdb.org/vehicle.php?id=415744

Ikarus 280
http://www.imcdb.org/vehicle_423211-Ikarus.html

The exterior shot is a toy bus, but the interior is based on a real RTS bus. I don't know if the RTS was made by GMC or TMC.
http://www.imcdb.org/vehicle.php?id=212069