Oh yes Bro you are right.
The fact is that in Italy the things are very different.
What you call the GT here is the 143 or the VVTI,what you call the GTS here it's the TS and has about 190 HP.
This two versions have also different colors: You can have the silver only on the 143. The Ts is only like mine or carbon blue.
For example in Italy no celica can be sold in yellow or in white, and if you look the dashboard you can see that the A/C is different,you cannot have automatic gearbox,and all manuals are 6 speed.
And, as usual, it's much more expensive