Hello,
the Embedded Wizard libraries (Graphics Engine and Runtime Environment) are completely independent from the hardware layout.
The entire display initialization and pin configuration is implemented within the file ew_bsp_display.c that you will find within the subdirectory /TargetSpecific.
This implementation is based on the examples provided within the ST Cube firmware. Feel free to adapt this according your needs.
Please note, that our Build Environment for STM32F769 Discovery is using the DSI display. In case you want to use a parallel RGB interface, maybe the STM32F746 Discovery board and the corresponding Build Environment is more helpful.
Best regards,
Manfred.