I'm probably going to bow out of this discussion pretty soon too.
Gnostics try to explain things.
Like Masons, Mormons, etc. This is true for twentieth century people who don't know much about gnosticism and what they know they don't much like. So various texts mention five trees in paradise and none of them explain or elaborate. There is no conclusion to be drawn from this at all. We don't know what the five trees mean, when the idea originated of five trees, what if anything it has to do with gnostics or esoteric Jews, or whatever, etc.