Hello padma priya ,
Please refer to the gpio_led_output demo under SDK.
There is gpio drivers you can use to control GPIO( for example GPIO_PortSet(), GPIO_PortClear(),GPIO_PortToggle() and so on. )
If you want to directly config registers, you can refer to the drivers, for example, config the " GPIO port toggle registers":

Hope it helps,
Have a great day,
TIC
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