Are Gray Paradise and Gray Labyrinth the same comic, just two names? How many other episodes are there?

The gray fruit, gray maze, and gray paradise are collectively called the gray trilogy

In order, it is gray fruit (13 episodes in total) → gray labyrinth (1 episode in total) Episode) → Gray Paradise (10 episodes in total)

The maze is a story about the male protagonist telling (reminiscing) about what happened when he was a child