smishing phishing via SMS

 You might get SMS messages on your smart phone, tablet, or land line. The method may be new, but the intent is the same. A message designed to get you to respond, click a link, or open an attachment.
As I have mentioned these messages are getting more real than real.
 In this case it would appear someone is attempting to take over your Google accounts and Google is informing you so you can stop that attempt.

When you respond with the 6 digit code Google has sent you, they use that code to respond to Google and resets your Google password for all your Google accounts to the password they supply

 The scheme creates a sense of urgency and panic. Think. 
 Be careful.