CONFIG_PPC_MPC5200_GPIO is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_PPC_MPC5200_GPIO.
Result is shown for kernelversion 5.6.18

MPC5200 GPIO support

modulename: mpc52xx_gpio.ko

configname: CONFIG_PPC_MPC5200_GPIO

Linux Kernel Configuration
└─>MPC5200 GPIO support
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
Enable gpiolib support for mpc5200 based boards

source code:
/arch/powerpc/platforms/52xx/mpc52xx_gpio.c