Has a College Football game ever ended 77-0?
It has. 77-0 has been a College Football final 31 times in 84,433 games. The first was Harvard beat Cornell on November 1, 1890; the latest was Texas Tech beat Lamar on September 8, 2018.
That makes 77-0 the 555th most common final score out of 2,216 that have ever occurred in College Football. One point away, 78-0 has happened 20 times and 77-1 has happened never. At one point the score disappeared for 35 years, between 1932 and 1967.