The Question and Answer section for Goethe’s Faust is a great resource to ask questions, find answers, and discuss the novel.
Marlowe does not portray a character similar to Gretchen in Doctor Faustus.
Unlike many renditions of the legend, Goethe's character is a student.... a man of knowledge rather than an alchemist. In this way, Goethe may be looking at the story in a way that is more similar to his own person, though, I do not believe he was...
This is actually a pretty detailed question for this short space.