Earlier quoted context omitted.
What do you mean “separate from google”? Golang’s success is directly and exclusively based on google envy back in 2009-2012.
Their point is that Golang has seen adoption and use outside the Google ecosystem, which is perhaps surprising, and something few other "company languages" have managed (e.g. Swift is actually quite a nice language design, but almost no-one uses it unless they're deeply involved with the Apple ecosystem).
Swift isn’t gaining much adoption because Apple aren’t putting much effort into promoting its use outside of the Apple ecosystem. And why would they when they don’t care about non-Apple stuff