GPIO to GPIO is used as only GPIO on CYUSB3011/CYUSB3013.
Otherwise, pin list is same as CYUSB3012/CYUSB3014.
(Deleted below on 15th Apr, 2019)
Hence, the differences against CYUSB3012/CYUSB3014 are .
1. Since GPIF-II interface bus is only available up to 16-bit, DQ  to DQ is not available.
2. UART settings on GPIO to GPIO is not available.