system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] Why does Gandalf visit the shire in the begging of The Fellowship Of The Ring? Is he visiting due to the ring? Or does he stumble upon it by accident?

sorry for the multipart question.
gpt
He's visiting for Bilbo's birthday. 

While he knows Bilbo has a magic ring, he doesn't really suspect it of being the One Ring until some time later, and there's actually a multi-year gap (like, 10 or something... it's been awhile) between Bilbo's Birthday and when he confronts Frodo about the Ring.