The go still only had one analogue stick and the PS3 is barely powerful enough to run GT5 so the vita has no hope. As much as I'd lve a vita version of GT, I'm not buying a one on release in anticipation like I did with the psp, only to wait years and then play GT for less than an hour 'cos of the load times. I'd be happy enough with a rerelease of the psp version with dual analogue support and a proper gt mode with upgrades.
Damn writing this post makes me want to go find my psp charge it and play gt