Baz, yes of course, the Evo and GSR gearboxes mount to the 6 bolt block.
I know theres a few dramas when trying to mount a VR4 gearbox in a CC Lancer, but I always thought a CC Lancer EVO/GSR gearbox in a VR4 would fit no problem as long as you remove the bolt-on bellhousing mounts off the GSR/EVO bellhousing.
Just to confirm, VR4 setups have a mount on the back of the gearbox (1), front timing belt (2), and front and rear of the engine block (3&4). You're not changing any of those by using a GSR/EVO gearbox are you?
If there's something in the way if using a GSR/EVO bellhousing on the EVO gearbox, I wonder if you could just put a VR4 bellhousing on the Evo gearbox anyway?