However, Go did originate at Google and the points the article makes about it having been designed to solve specific problems at Google are all true. It was not originally intended to be a widely-used general-purpose language: it just happened to catch on after it was released publicly.
Furthermore, the most significant contributors to the language design and its evolution (Rob Pike, Russ Cox, Andrew Gerrand, Brad Fitzpatrick, etc.) are all employed by Google.
It's not at all unfair or misleading to call it "Google's" in the way the article does.
However, Go did originate at Google and the points the article makes about it having been designed to solve specific problems at Google are all true. It was not originally intended to be a widely-used general-purpose language: it just happened to catch on after it was released publicly.
Furthermore, the most significant contributors to the language design and its evolution (Rob Pike, Russ Cox, Andrew Gerrand, Brad Fitzpatrick, etc.) are all employed by Google.
It's not at all unfair or misleading to call it "Google's" in the way the article does.