GC02S1 has pins that are unused in my application. For example I2C and GPIO pins. Your documentation does not specify if they should be connected to pull-up or pull-down resistors. Please advise on what to do with those pins.
General rule is that if you don’t plan to use the pins, they can be left floating unless specifically noted otherwise in the datasheet.
Unused GPIOs as well as I2C pins should be left open.
You can follow our EVK implementation as the reference.