It does. See https://ghostty.org/docs/config/keybind/reference#toggle_qui...

This works on MacOS, and on Linux sometimes:

> On Linux, the quick terminal is only supported on Wayland and not X11, and only on Wayland compositors that support the wlr-layer-shell-v1 protocol. In practice, this means that only GNOME users would not be able to use this feature.