No, in the book, it goes much more into Gumb's character; he was just a
lonely fellow--albeit a deranged one--who had worked with (or near?) that
first victim. It's been a while since I read it, but it explains him
much better than the movie does. I don't think I'd have really
understood all about him if I had to go by what the movie shows. Read
the book! It's better than the film!
Kent