All the articles here about about choosing repertoire or contain repertoire suggests for beginner, intermediate & advanced guitarists.
Classical Guitar Repertoire
Articles in Classical Guitar Repertoire
Two Common Ambiguities in Old Scores
Interview with Michael Karmon, composer
A Double Eulogy: Celebrating Hans Werner Henze and Elliott Carter
Great Guitar Pieces Nobody Plays: James Tenney’s Septet (1981)
New Music and the Electric Guitar
My Three Favorite Places to Get Free Guitar Sheet Music
The Tremolo Standards
Three Important Things to See
Beginner/Intermediate Repertoire List
Choosing Repertoire
Your Local Library as a Music Resource
Using Jazz to Expand your Repertoire