Please find my comments inline -
1: does Emwin library from psoc support this driver? if so can I have this driver files?
>> The emWin library package provided by Cypress for PSoC do not support GUIDRV_FlexColor.
2: if not, is it possible to make the driver offered by ST work for Psoc?
>> It may not be recommendable to do so since you may be violating the legal policies by doing so.