Google has switched the basis of their corporate workstation Linux distro from Ubuntu to be Debian testing directly, and renamed it from Goobuntu to gLinux.

This was publicly disclosed by one of the involved Googlers (she is also a Debian developer) at Debian's annual developer conference last year in Montreal, DebConf17.

It was just a 5-minute lightning talk in a segment with many lightning talks, but video should be online if you're curious, and some online news articles exist too.