Running gotip download now, I'm seeing in its output:
$ gotip download
[...]
*** You need to add /Users/gopher/sdk/gotip/bin to your PATH.
Success. You may now run 'gotip'!
$
"Success. You may now run 'gotip'!" is coming from gotip download and is right.
The "*** You need to ..." line above is coming from make.bash, but doesn't apply in the context of using gotip. When running subsequent gotip commands, they'll correctly add "/Users/gopher/sdk/gotip/bin" to PATH automatically.
gotip download should arrange the way it calls make.{bash,bat,rc} such that the misleading message won't show up in the output.
I'll send a fix. This is most likely a side-effect of me fixing #42563 recently. 😅