I'm not a fan of web novels. I'm a person who loves reading novels. I can't provide any information about light novels with anime characters running to reality. But if you have any other questions, I'll try my best to answer them.
I'm not sure specifically as I haven't read it. But generally, a novel titled 'the gauntlet' might be about a challenging journey or a series of difficult tests that the characters have to face.
The anime of 'Run with the Wind' often simplifies some complex internal monologues in the novel. In the novel, there might be more detailed descriptions of the characters' pasts and psychological changes. For example, in the novel, we can get a more in - depth understanding of Kakeru's past traumas and how they shape his current personality, while the anime may focus more on the present - day running training and competitions.
He might find it in a hidden chamber in Hogwarts. Maybe it was left there by a powerful wizard from long ago who had some connection to other universes.
A great infinity gauntlet story could also be fan - made ones. There are some amazing fan fictions out there. Some focus on alternate universes where different characters get their hands on the gauntlet first. For example, a story where Loki manages to steal the gauntlet before Thanos. It explores how his mischievous nature would play out with such ultimate power at his disposal. He might not have the same grand plans as Thanos but would surely cause chaos in his own unique way.