The shooting happened around 7:30 a.m. Saturday at a home in the 200 block of Ashland Creek Court.
The names of the deceased have not been released, but Gwinnett police Cpl. Jennifer Roberts said the man was 50 and the woman was 37.
“It appears that the victims were a divorced couple who were still sharing the same residence,” Roberts said. “Also present were their children, ages 10, 15 and 17.”