default or selected kernelversion does not have config value CONFIG_INPUT_GPIO.
Result is shown for kernelversion 5.4.229
GPIO driver support
modulename: gpio_axis.ko
configname: CONFIG_INPUT_GPIO
Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>GPIO driver support
In linux kernel since version 2.6.32 (release Date: 2009-12-02)
Say Y here if you want to support gpio based keys, wheels etc...