It is a first class member of GCC, under the GNU project. There are no possible concerns. I challenge you to attempt to articulate even one. No vague "google pulls the plug" statements, articulate a specific concern. Try it. You idiot crybabies, seemingly primarily people who got butthurt at having their hosted RSS reader pulled out from under them, never can.
You are either a troll or an idiot. Actually, I'm leaning towards both.
Is there a defined standard library that you can count on for the next decade?
Maybe in 15 years when Go has outgrown its lock-in it may be worth considering. At this point signing on with google is like playing russian roulette.