Ventura and Sonoma both show the light grey screen when AppleGPU settings enabled. Basically it's broken and has been for sometime. Sonoma beta works fine without the Apple para-virtualised GPU but as we know it limits things regarding what can be displayed. Even with the AppleGPU enabled in Big Sur & Monterey some things never worked e.g. Maps could not display any graphics. I have tried using the Apple development kernels in the VM and host to see what is going on but no clues given as to the issue.

For info, the Apple para-virtualised GPU does not requires VMware tools as it is built into macOS.

I would caution anyone on even trying using AppleGPU as it can lock up the VMX process and the only way to stop the VM is to use the terminal and pkill command.

I mainly only run macOS in Fusion (Intel) and it is obvious those days are coming to an end. It is interesting to see that Apple are working on built-in support for virtualising Apple Silicon macOS. It's not perfect but certainly a start.