I don't like ESPN as much as the next dude, but this isn't necessarily true. Gameday generally goes to the biggest game of the day, as you can see below (the games which hosted Gameday but were not broadcasted by ABC or ESPN are bolded).

2020

quote:
September 12: No. 1 Clemson at Wake Forest in Winston-Salem, North Carolina, Clemson 37–13
September 19: No. 17 Miami at No. 18 Louisville in Louisville, Kentucky, Miami 47–34
September 26: Florida State at No. 12 Miami in Coral Gables, Florida, Miami 52–10
October 3: No. 7 Auburn at No. 4 Georgia in Athens, Georgia, Georgia 27–6
October 10: No. 7 Miami at No. 1 Clemson in Clemson, South Carolina, Clemson 42–17
October 17: No. 3 Georgia at No. 2 Alabama in Tuscaloosa, Alabama, Alabama 41–24
October 24: No. 18 Michigan at No. 21 Minnesota in Minneapolis, Minnesota, Michigan 49–24
October 31: No. 3 Ohio State at No. 18 Penn State in University Park, Pennsylvania, Ohio State 38–25
November 7: No. 1 Clemson at No. 4 Notre Dame in South Bend, Indiana, Notre Dame 47–40 2OT
November 14: 2020 Masters Tournament at Augusta National Golf Club in Augusta, Georgia[25]
November 21: No. 14 Oklahoma State at No. 18 Oklahoma in Norman, Oklahoma, Oklahoma 41–13
November 28: No. 23 Auburn at No. 1 Alabama in Tuscaloosa, Alabama, Alabama 42–13
December 5: (Originally No. 25 Liberty at No. 14 Coastal Carolina) No. 8 BYU at No. 14 Coastal Carolina in Conway, South Carolina, Coastal Carolina 22–17
December 12: Navy at Army (Army–Navy Game) in West Point, New York, Army 15–0

2019

quote:
April 25, 26, and 27: 2019 NFL Draft pre-show in Nashville, Tennessee.[20]
August 24: Miami vs. No. 8 Florida (Camping World Kickoff) in Orlando, Florida (show held at Walt Disney World's Magic Kingdom), Florida 24–20[21]
August 29 (Thursday): Georgia Tech at No. 1 Clemson in Clemson, South Carolina, Clemson 52–14
August 31: No. 16 Auburn vs. No. 11 Oregon (Advocare Classic) in Arlington, Texas (show hosted from Sundance Square in Fort Worth, Texas),[22] Auburn 27–21
September 7: No. 6 LSU at No. 9 Texas in Austin, Texas, LSU 45–38
September 14: No. 19 Iowa at Iowa State in Ames, Iowa, Iowa 18–17
September 21: No. 7 Notre Dame at No. 3 Georgia in Athens, Georgia, Georgia 23–17
September 28: No. 5 Ohio State at Nebraska in Lincoln, Nebraska, Ohio State 48–7
October 5: No. 7 Auburn at No. 10 Florida in Gainesville, Florida, Florida 24–13
October 12: No. 7 Florida at No. 5 LSU in Baton Rouge, Louisiana, LSU 42–28
October 19: No. 16 Michigan at No. 7 Penn State in University Park, Pennsylvania, Penn State 28–21
October 26: No. 1 (FCS) North Dakota State at No. 3 (FCS) South Dakota State in Brookings, South Dakota, North Dakota State 23–16
November 2: No. 15 SMU at No. 24 Memphis in Memphis, Tennessee, Memphis 54–48
November 9: No. 1 LSU at No. 2 Alabama in Tuscaloosa, Alabama, LSU 46–41
November 16: No. 10 Oklahoma at No. 12 Baylor in Waco, Texas, Oklahoma 34–31
November 23: No. 9 Penn State at No. 2 Ohio State in Columbus, Ohio, Ohio State 28–17
November 30: No. 13 Wisconsin at No. 9 Minnesota in Minneapolis, Minnesota, Wisconsin 38–17
December 7: No. 1 LSU vs. No. 4 Georgia (SEC Championship Game) in Atlanta, Georgia, LSU 37–10
December 14: Army vs. No. 21 Navy (Army–Navy Game) in Philadelphia, Pennsylvania, Navy 31–7

2018

quote:

September 1: No. 14 Michigan at No. 12 Notre Dame in South Bend, Indiana, Notre Dame 24–17
September 8: No. 2 Clemson at Texas A&M in College Station, Texas, Clemson 28–26
September 15: No. 4 Ohio State vs. No. 15 TCU in Arlington, Texas (show was hosted from TCU's campus in Fort Worth, Texas), Ohio State 40–28
September 22: No. 7 Stanford at No. 20 Oregon in Eugene, Oregon, Stanford 38–31 OT
September 29: No. 4 Ohio State at No. 9 Penn State in University Park, Pennsylvania, Ohio State 27–26
October 6: No. 19 Texas vs. No. 7 Oklahoma in Dallas, Texas, Texas 48–45
October 13: No. 15 Wisconsin at No. 12 Michigan in Ann Arbor, Michigan, Michigan 38–13
October 20: No. 12 Oregon at No. 25 Washington State in Pullman, Washington, Washington State 34–20
October 27: No. 9 Florida vs. No. 7 Georgia in Jacksonville, Florida, Georgia 36–17
November 3: No. 1 Alabama at No. 4 LSU in Baton Rouge, Louisiana, Alabama 29–0
November 10: No. 2 Clemson at No. 17 Boston College in Chestnut Hill, Massachusetts, Clemson 27–7
November 17: No. 19 Cincinnati at No. 11 UCF in Orlando, Florida, UCF 38–13
November 24: No. 4 Michigan at No. 10 Ohio State in Columbus, Ohio, Ohio State 62–39
December 1: No. 1 Alabama vs. No. 4 Georgia (SEC Championship Game) in Atlanta, Georgia, Alabama 35–28
December 8: No. 22 Army vs. Navy (Army–Navy Game) in Philadelphia, Pennsylvania, Army 17–10