AMD stopped supporting Windows 8/8.1 around 2017 so there well probably be no Windows 8/8.1 drivers for any GPU cards manufactured after 2017.
Best bet is to try Windows 7 Driver if available. Those seem to be more compatible to Windows 8/8.1 OS If not then try Windows 10 driver. If none is able to install then the last thing you can do is update the GPU driver via Device Manager using the Windows 7 or 10 AMD Installation folder to get the driver.
You can see if Windows Update will install a compatible GPU driver if there is one available.
If that doesn't work then you are out of luck and would need to upgrade your Windows 8/8.1 OS to Windows 10. I believe you can still do it for free. Just google it.