Pretty much. The W window system for the V distributed system predates the Macintosh (as does the Apple Lisa/1983), and W was ported to Unix in 1983. Their immediate successors - X and the Macintosh - came out in 1984, and Windows 1.0 in 1985.

Windows 1.0 was fairly primitive, but Windows 2.0 supported overlapping windows (!) in 1987, coincidentally the year that X11 was released.