Re: GTV Radio Prob
The aperture is the same as most replacement HU's being straight forward DIN. The plugs on the rear are fairly universal so an adpater for approx a fiver should sort that no probs if plugs are different. I found they are the same as on a Vauxhall and a Ford I once had many moons ago. RE facia, not sure whether its a differnet shape to the standard 2.0 ts but the only prob would be the facia is a different shape and won't look so smooth, however with the aperture being the same a replacement should go straight in. It shouldn't be like some new radios on vehicles eg 147 that have a double DIN aperture that needs something to reduce the size, thus making it less secure. (Unless you get a head unit that is double DIN). (Please correct me if wrong as I'd like to know).
Hope this helps,