"Linux" typically refers to a standard Linux distriubtion, Debian Linux, Redhat Linux, or even subsets of those like Raspbian. They containing the core element

"Linux" typically refers to a standard Linux distriubtion, Debian Linux, Redhat Linux, or even subsets of those like Raspbian. They containing the core element (Linux) and a bunch of stuff on top (often things like X for example) For Linux without the GNU people typically say "Android" or "ChromeOS". However calling it GNU Linux is about as sensible as calling it Systemd Linux