There's also a fanfiction titled 'Rachel and GP's Duets'. This one focuses on their musical collaborations within the Glee universe. It beautifully weaves in their individual characters' traits while creating a harmonious relationship on stage and off. They face challenges like competition within the glee club but come out stronger together.
Another interesting piece is 'The Rise of Rachel and GP'. In this fanfiction, they both strive to bring a new style to the glee club. It delves deep into their friendship, how they support each other through personal and musical hardships. For example, when Rachel is having doubts about her future in performing arts, GP is there to encourage her and vice versa. It's a great read for fans of the Glee series who love these two characters.