We do not have any ready made library available. What you essentially need to do is use the SPI component and modify the SSD1327 driver files by writing the SPI specific APIs to make it compatible with PSoC4.
Here are some resources which should help you proceed further:
- OLED Display with PSoC5 - Hackster.io (Should be easy to port)
- Implementing an OLED display
- Cypress-PSOC-OLED/OLED.cydsn at master · derkst/Cypress-PSOC-OLED · GitHub