This reminds me ALOT of Gregicality, an addon for GT:CE. Currently it’s not in development and a new one for GT:CEu is being made. It’s notable for having REALLY REALLY COMPLEX tech trees. Here’s one. [For clarity, this graph is not for the entire content of Gregicality. Just a small part.]
It’s an incredibly deep and intricate addon, but I don’t know of any equivalents for Vanilla GT6.