who remaps tototas or is there a good chip for gt4 st205
 

as above

The GT4 ecu is not mappable. Not worth chipping as that just dumps more fuel in, and they overfuel as standard.
Options are... boost controller set to 1.1 bar, Dastek Unichip (not great value for money) or if you want to go over 320bhp MoTec ecu etc
Check www.fensport.co.uk they are the daddies when it comes to these cars.