Smith's Dictionary
(desolation), a place named only in (Judges 20:45) It would appear to have been situated between Gibeah (Tuliel-el-Ful) and the cliff Rimmon.
International Standard Bible Encyclopedia
gi'-dom (gidh`om): The limit eastward, from Gibeah toward the wilderness, of the pursuit of Benjamin by Israel (Jud 20:45). No name suggesting this has yet been recovered. It is not mentioned elsewhere.