Does Notes in my iPhone take up GB space?

If I have a lot of notes in my phone or really long notes in my phone does it take up space in my GB memory? Or no?

No. Text usually does not take up lots of spaces, maybe in MB. Video and photos and music files take up more space.

It will take space, but text files take tiny amounts of space.

To put it on context, you can typically fit something like 2,000 - 3,000 complete normal books (eg. Text versions of bookshop paperbacks) in 1GB of storage.

Yes it would, technically also GB space in the sense that storing them would provide less storage overall but no in terms of the actual notes being GB worth of space. May be something of a struggle for most to be a MB in space.