Go Language Settings

I need to do a college job and chose to do it in the Go language because I wanted to learn a new language. Yesterday I installed the .msi of the site and saw that I needed to configure the variables GOPATH , PATH and GOROOT . I configured them as follows:

• GOPATH = C:\Users\Gustavo\goprojects (where the goprojects folder I created and that's where I want all my Go language projects to stay)
• GOROOT = C:\Go\ (folder where Go has been installed)
• PATH = C:\Users\Gustavo\goprojects\bin

So far so good. But I use the Eclipse IDE and researching I have seen that it has a plugin called GoClipse that makes Eclipse be an IDE of the Go language, so I installed it through Eclipse's own marketplace.

After all this has been done, I created a new Go project and put the project in the C:\Users\Gustavo\goprojects path, and created a new .go inside a folder that is inside the src folder. When I was writing a Hello World, every time I tried to make it complete the code alone it appears an error I went to see and saw that I needed to download another plugin to work auto-completing , and this plugin calls gocode which is a project that is in GitHub.

And here's my problem. Where and how should I download this folder and how to activate it in my Eclipse? Did I set the variables correctly? Do I need to do anything else?

Q.: I use Windows 8.1, I have git installed.