Not at all, he focused on how Java and C++ do it, and later on the Go 2.0 proposal admited that they were a bit closed minded to look for how other language implementations work.
"In retrospect, we were biased too much by experience with C++ without concepts and Java generics. We would have been well-served to spend more time with CLU and C++ concepts earlier."
https://go.googlesource.com/proposal/+/master/design/go2draf...
This is definitive proof that the lack of generics was a mistake from the beginning.