I saw him a couple of times when I was teaching in Dallas, way back when he was coaching at SMU, but I didn't know him. My old college roommate, who was also teaching there at the time, did know him, took a few students to him, and thought very highly of him as a person and as a coach.
In the linked blog (thanks for posting that), I found Ralston's argument for Gonzales as GOAT quite persuasive.
There are two rules to success in life:
1. Never tell anyone everything you know.