In this story, Jesus is depicted as a veritable tourist. Not only does he visit India after his resurrection, he also goes to Greece and Egypt. If you have read my account of Notovitch's hoax you are already familiar with much of the idea content of this book.
That it is a fantasy of no historical value is very obvious. It is full of mistakes which demonstrate that the author is not even very knowledgeable in the basics of ancient history. Already in the first verse, the author confuses Herod the Great with Herod Antipas. Other persons appear with strange names which look like reading errors, e.g. the Egyptian priest Matheno, whose name resembles Manetho (lived 200 BC) and the wise chinaman Meng-ste who should probably be Meng-tse (lived 300BC). In chapter 28 Jesus visits "the three magi" -- but the NT does not say they were three, this is a much later tradition. Jesus is said to visit the city of Lahore, which was not built untill 600 AD.
The Aquarian Gospel is not a real Biblical hoax, since it does not claim to rest on a manuscript find. The author freely admits that all the information comes from inner inspiration. His name was Levi Dowling (1844-1911). He was the first writer to suggest that humanity is entering a new era, the Age of Aquarius -- an idea which has had great importance in the later New Age movement.
Even though the book itself does not claim to be Biblical, it imitates the Bible with its sections, chapters and verses. Extracts from it have been quoted by careless occult writers, e.g. Nicholas Roerich who claimed his quote from the book was an example of a living folk tradition in Ladakh. James Churchward claims to have heard the story about Jesus and Ajainin from an indian rishi, but it's actually taken from the Aquarian Gospel.
Dowling shows evidence of having read other hoaxes, especially Notovitch. He borrows a rite of initiation from Apuleius' description of the Isis mysteries (in "The Golden Ass"). The Jesus he depicts is a traveller in search of wisdom, a familiar theme in ancient literature -- we have e.g. the story of the neo-pythagorean philosopher Apollonius of Tyana who travelled to India to learn Brahmanian wisdom, visited the nude philosophers of Egypt and was initiated into the Eleusian mysteries in Greece. But Dowling's real source of inspiration lies closer: it is Christian Rosencreutz, the alleged founder of rosecrucianism who is said to have travelled to india to seek wisdom before he founded his brotherhood.
The Aquarian Gospel differs from most other bible imitations in one important respect: Dowling believed that Jesus had risen from the dead, just as the real gospels tell, and he lets the risen show himself not only to the disciples but also to the Prince of Orissa and the magi in Persepolis. (That this city was permanently destroyed in 330 BC seems to have escaped him.) The Aquarian Gospel should perhaps be regarded as a novel, an imaginative attempt to reshape Jesus in the mold of a tradition Dowling liked. Sadly, the result is just a pale Bible imitation with little or no depth.