These critical editions of Gnostic titles include texts in the original language, translations (in English or French), analytic commentary, notes with additional information, and bibliographhies. Some of the editions also cite the ancient works that are relevant, including Biblical, patristic, and Greek and Roman literature. Not all Gnostic texts have been treated in these critical editions.
To find other commentaries not listed here, check in Tripod or, for greater scope, WorldCat. Search the text's English title either as a Subject or a Title: Example: apocryphon of john [Subject Search] = 60 results Including:
Ending of the Apocryphon of John and the beginning of the Gospel of Thomas (Wikimedia Commons)