Gonzaga doesn't deserve a 1 seed over Louisville, Indiana, Miami, Kansas, or Duke. Gaudy win total, but they haven't beaten anybody.
Gonzaga has a lot of overlap with Kansas, because of those four wins over Big 12 teams. And doesn't have a single bad loss, unlike KU.
Beyond that, Kansas has better profile.
I would put Gonzaga at 2, but I'm assuming they'll get a 1, since there are no other truly "West" teams with high-impact resumes.