ACTUALLY
When one who is a slave strikes a free person the penalty is not infrequently death by impalement, preceded by lengthy torture.
---Assassin of Gor, 5:74
...A man who refused to practice his livelihood or strove to alter status without the consent of the Council of High Castes was, by definition, an outlaw and subject to impalement.
---Tarnsman of Gor, 3:46
Both slave and free could be found a sentence of death by impalement, depending on gorean civil law...
Raz