Can you tell me what the book says about Gajanan Maharaj's arrival in Shirdi?

The provided text does not contain any reference to Gajanan Maharaj. Instead, Chapter 0 describes the arrival of a different holy figure in Shirdi. This individual, who would later be known as Sai Baba, came to the village with a wedding procession from the family of Chandbhai Patil. The procession stopped near the Khandoba temple, where the holy man was greeted by a resident named Mhalasapati with the words 'Aavo Sai Baba,' a name that he would be known by thereafter.