Giloh was a town in the hill country of Judah. It was the native place of Ahithophel, David’s counselor who later supported Absalom.
Ahithophel is called the Gilonite because he came from Giloh. During Absalom’s revolt, Ahithophel later committed suicide when his counsel was not followed.
Giloh is probably represented by ruins called Khirbet Jala in the hills near Hebron.