A dismembered arm shown within 5 minutes of start of movie. Some animal carcasses throughout, but little amount of blood shown. Same with character injuries, very mild gore. Guns are used for defense toward the end.
Blood splatters onto a windshield after a character is attacked inside of a car
Corpses are shown sitting in trees a few times. They aren't overly graphic, just slumped over in tattered clothes
Mild cuts/bruises seen on survivors attacked by the monster