my mate has a HSV GTO LE (Limited Edition - $90k when came out), which came out 285kw stock, and with a few air mods and exhaust it was just over 320, pulling 257 rwkw.
when my car was just under 200rwkw (and only rwd) from stationary, he would kill me untill my boost came on, and i would then keep with him till abot 3rd gear then would slowly break away (v8).
On rolling at about 30kmh, would b side by side, slowly creap up, then the GTO would pull away slowly after 4th gear.
Keep i mind his was AUTO and mine was MANUAL, hence the beter take off.
With the 4wd and the extra kw, im sure ull bea this GTS, as the GTS is heavier than the GTO and my mates GTO was a LE with extra sports features and weight less than th stock GTO.