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