I don't think you can? Unless I am missing something?
You can add Terminal to "developer tools" so you can launch stuff from the shell without Gatekeeper interfering, but is there really a way to disable the gatekeeper warning for downloaded apps altogether?
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.
I don't think you can? Unless I am missing something?
You can add Terminal to "developer tools" so you can launch stuff from the shell without Gatekeeper interfering, but is there really a way to disable the gatekeeper warning for downloaded apps altogether?