I think the motor is the same on GT's and Glanza's. I dont see why they would be different to be honest, it may just be the case of changing the plugs round but thats not a big job to do at all.
Hey dan, that motor on ebay is from a 4 door starlet, also it isnt drivers side as the wiring on the motor should be white, and passenger side should be yellow. I recently sold drivers side motor for £50 yes..
is the electric window and the manual window the same? someone smashed mine and i bought a replacement but the window clip inside is too far for the window.