What is the relationship between Sai Baba and Gajanan Maharaj as described in the account of Baba's arrival in Shirdi?

Based on the provided information, there is no relationship described between Sai Baba and Gajanan Maharaj, as Gajanan Maharaj is not mentioned in these excerpts at all. Chapter 0 is dedicated to explaining Sai Baba's origins and arrival. It recounts his initial meeting with Chandbhai, his journey to Shirdi with a wedding party, and his encounter with Mhalasapati at the Khandoba temple. It was Mhalasapati who first greeted him with the words 'Aavo Sai Baba,' which became his name.