Final answer:
In the context of James Baldwin's "Go Tell It on the Mountain," John symbolizes Elizabeth's past for Gabriel, serving as a reminder of a time and relationships she had before him.
Step-by-step explanation:
The character of John in Gabriel's perspective can symbolize different aspects depending on one's interpretation of their relationship within the context of the narrative
If we are referring to James Baldwin's "Go Tell It on the Mountain," then Elizabeth's past would be a strong symbol that John represents for Gabriel. John is a constant reminder of Elizabeth's past life and her relationship with a man who was not Gabriel, which amplifies Gabriel's struggle with accepting John as his own son.
His presence is a living embodiment of a time before Gabriel was a part of Elizabeth's life, and thus, he serves as a symbol of the life that she had led. This embodiment challenges Gabriel’s religious faith and his perception of family and righteousness, but isn't a direct symbol of his faith itself.