The Gorgon Head in BathP

Devotees of Celtic lore claim that the face is actually a Celtic sun god; however, it seems unlikely that Roman architects would have carved the face of a Celtic god upon the frieze of a temple to Minerva, even if the sculptor was, in fact, a Gaul, as is now believed. I think he would look good on the wall of the Sun Room in Larach Sithe. Do we know anyone that could carve him if I provided the wood?

PS The P is silent.