Nicholas Cody Tate is set to die by lethal injection at 7 p.m. on Tuesday for the murders.
Death penalty cases in Georgia usually take much longer to work through the system, but Tate's case is unusual because he refused to challenge his death sentence through habeas corpus appeals. Doing so would likely postpone his execution for years.
His lawyers won't comment on the case. But he offered his views at a 2009 hearing where he said, "you caught me red-handed."
Authorities say Tate and his two brothers broke into Chrissie Williams' home and killed the woman and her daughter. The two others are serving life sentences.