GopherPit is a web service that allows you to have remote import paths for Go (language) packages with custom domain or a subdomain under gopherpit.com.
The key benefit is that your packages are independent of the version control system provider, whether it is GitHub, Bitbucket or private repository. You can change it whenever you like, and also keep the same import paths. Also, custom domains means better branding of your packages, if you care about it.
The service is free of charge.
The functionality is provided by the mechanism of the go tool:
"For code hosted on other servers, import paths may either be qualified with the version control type, or the go tool can dynamically fetch the import path over https/http and discover where the code resides from a <meta> tag in the HTML."
GopherPit just provides a service to serve and manage this meta tags. It does not require any additional tools beside the go tool.