Well not on Mac, and I don't have anything with GNOME at hand. But that's besides the point: 1. it's not obvious (no other random part of the window can be used in the same way), 2. it's too many things in too little space (cognitive load, applies to Mac as well), 3. you have to be mindful about accidentally clicking instead of dragging (most non-Apple trackpads are simply bad), 4. it's ambiguous what's gonna happen for any UI element that could respond to drags (address bar, seekbar, etc).
I have similar problems telling which parts of the window can be used to drag them around on a Mac. There's a secret feature that allows you to hold Cmd+Ctrl to drag the window by clicking (almost) anywhere, but every release of macOS breaks it for yet another app.
