Gibson is having three separate interviews with Palin, ABC said. Parts of the interviews will be spread around other ABC news programs, including "Nightline" and "Good Morning America."
The prime-time special, at 10 p.m. EDT, will also include a bio of Palin by ABC's Kate Snow and a round-table discussion on the presidential race moderated by George Stephanopoulos.
The Alaska Republican has proven to be a ratings-grabber during her short time on the national political scene. Her speech to the GOP national convention last week was seen by more than 40 million people, according to Nielsen Media Research.
A Fox News Channel documentary, "Governor Palin: An American Woman" last Saturday was the highest-rated prime-time documentary in the network's history, with 2.7 million viewers.
CNN is also planning a Palin special this weekend.