Gnome is not that different from Mac. You have your Mac-style status bar at the top, dock for apps which you can float or hide, typical window management, etc.
I use GNOME daily on one of my laptops and I don’t agree at all. It has some surface-level similarities, but overall is more comparable to something like iPadOS or Samsung DeX when connected to an external screen+KB+mouse.
The global menubar is the biggest difference, but there’s also a pervasive difference in philosophy throughout the desktop; where macOS will have power user functionality tucked away in a menu or hidden behind a modifier key (progressive disclosure), GNOME will just remove the function altogether.
Pantheon is very similar, except dressed up in an (admittedly pretty) skeumorphic theme that reminds me of OS X 10.9 Mavericks.
That’s not to say it doesn’t have its charms, I use it after all, but it’s not a Mac OS analogue in any way.