gotv is tool which provides a way to manage multiple versions of the official Go toolchain. It is kinda of a re-implementation of gvm but with a different command set. Each Go toolchain version is built from the Go git repository.
This tool is mainly built for me to check differeces of official Go toolchain verisons in writing Go 101 books.
Please visit https://go101.org/apps-and-libs/gotv.html to details.