Guessing this is a troll but nevertheless:
You most certainly CAN'T convert a Giant TCR2. Where do you propose to put the cross tires? On your back? What about brakes?
The GT needs only slightly smaller tires which are intermittently difficult to find and a drop bar.
Converting over to road controls normally daunts anyone converting a road bike because it's a larger than expected expense (bar end shifters are like $80, brake levers, handlebar, and tape will run close to another $75 unless you have the parts laying around.)
Why would you think that converting the GT over would be preferable to using it the way it is? The only real difference is that flat bar and many people prefer those.