Ok, so these are all of the forty-four Gandalfs featured in this version of the story:
(Major Gandalfians only) Gandalf list: (1/44-43/44):
Color Gandalfs: Yellow, Red, Blue, Green, Orange, Purple, Pink, Maroon
Greyscale: Brown Gandalf, Gray Gandalf, Black Gandalf, White Gandalf, Shadow Gandalf
Unknown/Anonymous Gandalfs: Rainbow Gandalf, Multicolored Gandalf, Invisible Gandalf
Strange Gandalfs: Gold Gandalf, Silver Gandalf, Toilet Gandalf
Letter Gandalfs: A Gandalf, B Gandalf, C Gandalf
Number Gandalfs: 7 Gandalf, 8 Gandalf, 9 Gandalf, 7.5 Gandalf (made and destroyed instantly due to the law of Who-Knows-What)
(Number Gandalfs became Symbol-Gandalfs; Letter-Gandalfs became Description-Gandalfs. The new Gandalfs turned back into the original ones almost immediately.)
Nondescript Gandalfs: Shiny Gandalf, Dull Gandalf
Undescribed Gandalfs: Weird Gandalf, Tin-Gandalf, Hula Gandalf, Air-Gandalf.
Cult Gandalfs: Large-Ear Gandalf, Existential-Crisis Gandalf, Gandalf-Gandalf, PC Gandalf, Hacks-Gandalf, Scammer Gandalf
Later Gandalfs: Gandalf-Gandalf-Gandalf, Pi Gandalf, Infinity Gandalf, Sauron-Gandalf, Forty-Four-Shade Gandalf
The 44/44 (See, 44-Shade Gandalf had a purpose!) Gandalf who put an end to all the chaos: Gandalf, or GANDALF. Next form: SUPER GANDALF (also counted as Gandalf, somehow)
Geometry Gandalf, Minor Gandalf, Major Gandalf, Chinese-chess Gandalf, Baguette Gandalf, Tech-support Gandalf