It isn’t. I mean yeah gateway is what you described. But the functionality is also included in Jetbrains IDEs and doesn’t require any manual install on the server. It installs its own thing exactly like VSCode does.
I can't find any such thing in PhpStorm v2024.3, can you tell me the feature name? Is it this you are thinking of (which requires some clear manual steps)?
https://www.jetbrains.com/help/phpstorm/remote-development-o...