Where does go get install packages?

I've been given instructions to run go get which seems to succeed, but it's not clear to me where the package was installed to so I can run an executable from it.

Per https://golang.org/doc/code.html#remote it seems it will be installed in $GOPATH/bin but $GOPATH isn't defined in my shell (though the go get command seems to work fine). Go is installed via Homebrew.

I found the missing clue by running brew info go, which says:

==> Caveats
A valid GOPATH is required to use the `go get` command.
If $GOPATH is not specified, $HOME/go will be used by default:
  https://golang.org/doc/code.html#GOPATH

From that I found the executable in question at $HOME/go/bin.

Stack Overflow Q#50633092, score: 117