default or selected kernelversion does not have config value CONFIG_GPIO_RTD.
Result is shown for kernelversion 6.8-rc5

Realtek DHC GPIO support

modulename: gpio-rtd.ko

configname: CONFIG_GPIO_RTD

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>Realtek DHC GPIO support
This option enables support for GPIOs found on Realtek DHC(Digital
Home Center) SoCs family, including RTD1295, RTD1315E, RTD1319,
RTD1319D, RTD1395, RTD1619 and RTD1619B.

Say yes here to support GPIO functionality and GPIO interrupt on
Realtek DHC SoCs.

source code: