The 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.
Gibson is traveling to Fairbanks and Wasilla, Alaska, for the first TV interviews with Palin since she was selected as John McCain's running mate. The first excerpts of the talks will be shown on "World News" Thursday.
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 Charles Gibson's interviews with Sarah Palin will form the basis of a special prime-time edition of "20/20" Friday.
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.