Not sure if best to open new issues for this or add to others:

As mentioned in the WIKI version 0.3.0 release:

Giga Display shield supported (no wrapper library yet)

Is there example code that demonstrates the usage of the current code?

I see some information up at:https://github.com/zephyrproject-rtos/zephyr/blob/main/boards/shields/arduino_giga_display_shield/doc/index.rst

My quick look at the board data, it appears like maybe it is setup for LVGL?

That index page shows some setup but hoping there is something more Arduino centric.