In addition, Colin Gray faces eight charges of child abuse and four counts of involuntary manslaughter.
Authorities said the allegations arose from his letting his son have a gun.
The incident at Apalachee High School in Winder, 50 miles northeast of Atlanta, on Wednesday claimed the lives of two instructors and two pupils.
Nine more people were hurt in the shooting, including eight pupils and one teacher. It is anticipated that they will fully recover.
According to Barrow County police, 14-year-old Colt Gray turned himself in after being “engaged by school resource officers inside the school”.
He is charged with carrying out the murderous shootings outside his mathematics lesson using an assault-style gun.
There are four counts of criminal murder against him.
Colt Gray and his father were questioned last year in relation to online threats regarding a school massacre made on the gaming platform Discord, which came about as a result of an FBI tip.
Investigators stated they denied saying the things.
The sheriff’s office published police reports that stated that neither Gray could be linked to the Discord account, and that there was no need to take away the family’s firearms. As a result, the investigation was closed.
Details about the Discord account, which included a digital evidence trail showing it had been accessed in several Georgian locations as well as Buffalo, New York, and Russian profile information.
