[fastball]

Yes you can turn of gatekeeper entirely just by running this in the Terminal.

  sudo spctl --master-disable

[newaccount74]

I've just tried that, and I still get the gatekeeper warning, so it doesn't seem to work anymore on macOS Ventura.

Executing the command does make the "Anywhere" option show up in System Settings, but from testing it doesn't seem that this option makes a difference.