Besides Westin and Sweeney, longtime ABC News medical editor Dr. Timothy Johnson and Gibson's adult daughters, Jessica Gibson Rosen and Kate Gibson, also toasted the "World News" anchor.
"We knew things were going to be OK when Charlie was at the helm," Dr. Tim said. "And that's not only because of his incredible intelligence and his great communication skills, but because he does give us a part of himself, he gives us a part of his heart."
"It is time for anchor away at the moment," he added, "but you should know that in our hearts there will always be a permanent and special place for you. And so, we thank you for the memories, and we wish you Godspeed."
Several other Gibson colleagues looked on as he was toasted. Among the guests were Barbara Walters, "Good Morning America" anchors Robin Roberts, George Stephanopoulos and Juju Chang, "20/20" anchors Elizabeth Vargas and Chris Cuomo, "Nightline" anchors Terry Moran and Cynthia McFadden, and ABC News correspondents including Martha Raddatz, Jake Tapper, Ron Claiborne, Dr. Richard Besser, Dan Harris, Jim Avila, Betsy Stark, Lisa Stark, Bob Woodruff, Stephanie Sy, Andrea Canning and John Quinones.