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 critical editions and commentaries check in Tripod or, for greater scope, WorldCat. Search the text's English title either as a Subject or a Title:
Example: [Subject Search] apocryphon of john = 60 results including:
Mary Magdalene by Perugino c. 1500 (Wikimedia Commons)