The ranger told police he approached a woman in a pickup truck around 10 p.m. Wednesday to tell her the park overlooking the lake was closed. But the woman opened fire, wounding the ranger below the chest. Police who searched the area found a woman dead inside the truck a short time later.
The ranger walked to a road where he summoned help.
"He was approaching this vehicle with the intention of just saying, 'Hey, the park is closed, and you need to go,'" Gwinnett Police Cpl. Jake Smith said. "And there was no kind of confrontation or argument or anything like that between the two of them. She simply produced the gun and shot him one time."
The ranger was taken to a local hospital for surgery. His condition was not immediately available. The names of the ranger and the suspect have not been publicly released.
Rangers at the park carry pepper spray but not firearms, authorities said. They do not wear bulletproof vests.
Copyright 2013 The Associated Press.