how to receive data from gps neo-6m module to uar1 of stm32f103c6 and then display the data using another uart2 configuartion and HAL is very difficult to understand is it possible using only interrupts

[Tesla DeLorean]

If you don't like the HAL, consider using the older SPL, or using register level methods.

Yes, could be done with interrupts. With HAL you'd use this via callbacks to manage a holding buffer, and dispatch to the other USART.

I have posted GPS examples to prior threads, perhaps dig a little.