To answer your question: Compared to Goretex, it’s not as waterproof. That being said, it is not the same material at all. It is not loud like Goretex ie it doesn’t have the same properties as a tarp that has been cut to act as a jacket. I’d need more info from you on what you mean by “Goretex” because Goretex is like Vibram and Dupont’s fabric is used across multiple brands in various iterations of thickness. Ultimately, Goretex isn’t a finished fabric; it’s a thread used in various thicknesses/weaves depending on the need of the buyer.
It is a thin jacket, similar to a thin-layer Goretex rainshell. It is far more breathable and flexible. A spray of Sno-Seal or some Nikwax tech-wash will improve its waterproofing but you’ll lose a bit of breathability as well. Simply put, it is not a bomber rain shell. It is more like a water resistant flex jacket.