default or selected kernelversion does not have config value CONFIG_GPIO_GEMINI.
Result is shown for kernelversion 5.4.33
Gemini GPIO
modulename: gpio-gemini.ko
configname: CONFIG_GPIO_GEMINI
Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>Gemini GPIO
In linux kernel since version 4.5.1 (release Date: 2016-04-12)
Support for common GPIOs found in Cortina systems Gemini platforms.