I was wonder what all of you would want from your significant other if they were to buy you a gift related to this game?

Anything really. From figurines of characters, artwork both official and fan made, a Cu plushie, the official score.

What part of the game do the players go to Florence, Italy? His favorite part is when they go to Italy, so I figured I'd play through that for ideas of what he likes.

Never. The second chapter deals with visiting Rome in the period of the emperor Nero. There's also a character named Florence Nightingale, a nurse that left her mark in mankind's history.

That being said, Is this a game I, a person who doesn't know anything about games, could play?

Yes. Just give it a shot, see if you like it.

who is Gramp?

A nickname from the community to refer to King Hassan. The founder of the Hassan-i-Sabbah. The name originally came from the EIRRI comics floating around in the sub.

And are there figures of them?

Yes, there's even a official figure for the tabletop game FGO Duel.