If anything a character that GH should really bring back is Dawn Winthrop and for those of you who don't know who Dawn Winthrop is, she was Monica's illegitimate daughter
Dawn came to Port Charles in 1989 and became a student nurse at GH. It was then learned that Dawn was Monica Quartermaine's long-lost daughter with David Langton. Dawn was excited to be a part of the Quartermaine family and to fall in love with Tracy Quartermaine's son, Ned Ashton. Ned was so happy with Dawn that he bought her Spoon Island.
In 1990, Ned and Dawn became engaged. At the same time, Dawn had a crush on con artist Decker Moss, but still loved Ned. On their wedding day, it was revealed Ned had a one-night-stand with Dawn's mother, Monica. Dawn was so angry, she left Port Charles with Decker in Ned's car.
Dawn and Decker returned to Port Charles in 1991. Dawn made up with her mother and got engaged to Decker. While Decker was a way on business, Ned tried to forge a fake letter to Decker from Dawn. When Dawn found out, she slapped him.
Dawn moved in with friend and fellow nursing student Meg Lawson in a condo paid for by Monica. Dawn then became very sick, but then got better around the time Decker returned to town. They were very happy.
Edge Jerome wanted to break up and kill Decker and Dawn for Dawn's money. Then, during a fire at Body Heat, a club Dawn and Decker owned, he hit both of them in the head with a pipe and framed Decker. Sadly, Dawn was murdered. Decker was later proved not guilty and left town depressed. Monica was also very upset.
That is Dawn's character history for the most part
Hey if they can bring back so many other dead people, then why not Dawn? Dawn wasn't a Quartermaine but still she was Monica's daughter and if Dawn were alive right now Monica would have one of her children back besides AJ