Since about midnight eastern, people have been complaining about not being able to send files via Gmail, or connect to many of the G suite services.
Other problems seem to be recording issues, creating files issues in Drive, CSV user upload issues in Admin Console and posting message issues in Google Chat.
At last check, Google says they’re aware of issues, but don’t appear to have any idea of what’s going on – or when it will be fixed. “Our team is continuing to investigate this issue,”