Not the GP, but I'd recommend Merkur Classic Safety Razor 33C, or any of the Merkur models that are generally discussed as beginner friendly, and an sampler pack of blades.

The sampler pack is key. Every person is different, and every DE razor user I know uses something different. I won't even tell you what I use, because it's not relevant.

As a secondary recommendation, shaving brushes and a proper shaving cream / soap are incredibly worthwhile investments. I usually suggest Proraso as a cheaper, but still decent starter soap to use until you have a better idea of what works for you.