Gentoo is a Linux distribution that provides a wide range of packages and tools for developers, including the popular GNU Compiler Collection (GCC), OpenSSH, and many more. Here are some examples of where you can find Go programming source code on Gentoo:

• https://github.com/gentoo - This is the official repository for Gentoo Linux, which contains a wide range of packages including Go.
• https://github.com/golang/go - The official Go repository, where you can find various examples and tutorials in the src folder.
• https://github.com/gopherjs/gopherjs - A project that compiles Go code to JavaScript, which is useful for web development.
• https://github.com/golang/go/wiki/Projects - This wiki page lists various projects developed using the Go language.
• https://github.com/golang/go/wiki/Samples - A collection of sample code that demonstrates various features of the Go programming language.
• https://github.com/golang/go/wiki/Library-Design-Principles - This page provides a guide to designing and implementing libraries in Go, including best practices for writing idiomatic Go code.
• https://github.com/golang/go/wiki/CodeReviewComments - A list of comments that can help you improve your Go code.
• https://github.com/golang/go/wiki/LearnGo - This page provides a comprehensive guide to learning the Go programming language, including tutorials and exercises.
• https://github.com/golang/go/wiki/RoadToGolang - A roadmap for learning Go from beginner to advanced level.
• https://github.com/golang/go/wiki/Tutorials - This page provides a list of tutorials and resources for learning the Go programming language.