it is Possible ? To add FreeRTOS on PIC18F27Q10 ?
You should be able to use this port - https://github.com/FreeRTOS/FreeRTOS-Kernel/tree/main/portable/MPLAB/PIC18F.
how to do it?
is there any procedure?
You mean to ask how to use this port in your application? If so, the following page should be useful - Creating a new RTOS project.