Can anyone help with the maker on this necklace, please?

Necklace has a very clear marking, but I have been unable to identify it. Any help with maker and age of the piece would be appreciated.

I have found this piece made by a Julalita Lamy, Vintage Zuni Julalita Lamy Sterling Silver Sun Face Inlay - Etsy. I imagine the G might possibly be the husband, or child learning?