That brand, no I suppose not. But when they were planning Pearson they should have connected the existing passenger rail between the Malton area and Toronto’s Union Stn. Or, inversely, when the new Malton stn was planned in the early 1970s it should have been to Pearson.
https://en.m.wikipedia.org/wiki/Malton_GO_Station
Of course the station needs better service as well. I remember starting my very job in freight forwarding in 1995 at Airport Road and Orlando and seeing the Malton station. I immediately thought that’s the better way to get from my place downtown to work. But no, the trains only ran outbound from Union in the afternoon.