Google spins off GFiber, formerly Google Fiber, forming an independent provider with investment firm Stonepeak's Astound; Google will retain a minority stake (Ari Levy/CNBC)

Ari Levy / CNBC: Google spins off GFiber, formerly Google Fiber, forming an independent provider with investment firm Stonepeak's Astound; Google will retain a minority stake — Choose CNBC as your preferred source on Google and never miss a moment from the most trusted name in business news. —…