GLAAD evaluated the primetime programming on the five broadcast networks and 10 cable networks.
According to GLAAD, of ABC Family's 103 hours of original programming, 55 percent included "LGBT-inclusive images which also reflected the ethnic and racial diversity of the LGBT community."
"As television audiences get to know our community and the common ground that we all share on the screen and in their own lives, acceptance is growing," Mike Thompson, acting president of GLAAD, said in a statement. "Inclusive programming is a hit with critics and audiences alike who cheered for Kurt and Blaine's romance on 'Glee' or watched the wedding of Callie and Arizona on 'Grey's Anatomy.'"
The CW is the top broadcast network with 33 percent of its primetime programming being LGBT-inclusive. Fox came in with 29 percent this year, ABC took third place with 23 percent amd NBC in fourth with 15 percent. CBS pulled in last with 10 percent. However, CBS got a "Failing" grade from GLAAD for the last two years, but this year received an "Adequate" rating.
After last year's failing grade, CBS added gay characters to 'The Good Wife' and 'Mike and Molly.'
"CBS showed the most improvement of any broadcast network, however we continue to urge them to address the problems and deficiencies in their representation of our community, and hope their forward momentum will soon have them catching up with the other broadcast networks," Herndon Graddick, senior director of programs at GLAAD, said in a statement.
Besides ABC Family's high marks, Showtime clocked in at 37 percent, TNT at 33 percent, HBO and Lifetime at at 31 percent, AMC at 29 percent and Syfy at 22 percent. USA Network had a failing grade last year, but upped its percentage from 4 to 18, earning an "Adequate" rating.
"Programs like 'Pretty Little Liars' and 'Greek' have woven gay, lesbian, and bisexual characters into their stories in a way that mirrors the diversity of our community and the experiences of younger generations," Graddick said. "Viewers expect to see television environments that accurately reflect what it's like to be a young adult, and today that includes young adults who happen to be gay."