I think it likely that sweet summer child's current definition of young and unlearned in the ways of the world is from Game of Thrones for the reasons already explained in this thread. Whenever that phrase was used before it doesn't appear to have had the same meaning.
And while there are only two mentions on Twitter of a specifically “wet and windy night in Stoke” before Gray’s monologue – there are thousands afterwards from all corners of the planet.
This predates Gray by almost 2 years and is only 4 months after stoke returned to the top flight. Im not rulling out other influence from other sources/forumites, but i think we can perhaps take "credit" for this one.