Would it be possible to use the GT graphic and physic engine for other games. I feel like if this engine was used for the gta it would be differnt; if it was even possible.
yea it would be possible to use the engine for other games but i dont think it would work to well in GTA/ the engine is designed for racing physics so it would only be smart to use it in racing games. gta has to much on foot action, ex[;osions, gun fighting and the GT engine isnt designed for that kinda thing. though i dont think they would ever sell there engine for public use seeing as any of there competitors like forza of PGR could use it.
PD have used the GT engine in the past for a different game - Tourist Trophy. Ultimately, it's just a very impressive driving simulator engine, and wouldn't really work in a game like GTA for the reason stated above.
As said above, it can be used, but would be terrible for a game like GTA, and if you only wanted to use it for driving only parts of GTA and keep the current GTA engine for all the other stuff I think both the 360 and PS3 would struggle!
Also to use the GT engine R* would have to pay Polyphony Digital/Sony a hefty licencing fee!