Gandalf the White is overwhelmingly a force for good.
Gandalf was originally known as Gandalf the Grey. After his rebirth, he became Gandalf the White in replacement of Saruman. Gandalf the Grey and after his resurrection he became Gandalf the White.
Gandalf is the white rider.
He is part of the fellowship of the ring. He acted as their guide. He was gandalf the grey and then he returns as gandalf the white in 'the two towers.' To add to that he is awesome!
The basic background behind the character Gandalf from the Lord of the Rings Series is that he is a wizard. He is initially called Gandalf the Grey but after resurrecting he is then referred to Gandalf the White.
I am not sure exactly what you mean, but I will answer for the two possibilities. In the movies/books The White Wizard joins ranks with Sauron and leaves the Elves, Humans, Hobbits, Dwarves, and various other races on the "good guys." Gandalf, being the second strongest wizard, takes up the title of The White Wizard after being killed in mortal combat by the Balrog, he is then reborn. Why they chose to make Gandalf caucasian, I do not know, it is probably just because that actor was best suited for the role of Gandalf.
qoute ''gandalf the white, YOU SHALL NOT PASS''
Gandalf the white
Gandalf was originally Gandalf the Grey, but after he was reborn he became Gandalf the White. He was played by Sir Ian McKellen in the popular movie series. Saruman was the white wizard in the Fellowship of the ring. Gandalf was the grey wizard. Since Gandalf fell in Moria, he was sent back, thus given a different color. So Gandalf became Gandalf the White and Saruman was left without a color and defeated.
Gandalf Three wizards played a direct part in The Lord of the Rings (movies and books): Gandalf the Gray (and later the white) Saruman the White (and we know what happened to him) Radagast the Brown -- birds, trees flowers were his specialty. Two others were mentioned obscurely. They were the Blue Wizards, Alatar and Pallando.
Gandalf is particularly good with fire. He uses fireballs and smoke on several occasions in The Hobbit.
Gandalf is in Mirkwood, at the fortress of Dol Guldur. He went there with the White Council to drive the Necromancer out of Mirkwood.
Gandalf the White Wizard