Thanks for the feedback. I wrote this article after myself booking an
Etihad award flight on GOL. I had similar issues to what you described when calling up, but we got there in the end.
Regarding the luggage allowance on GOL basic economy tickets, the
Etihad agent informed me that there was no allowance but I have no idea if she really knew what she was talking about. On the GOL website, as you say, it also says that there are no included bags. But the
Etihad Airways receipt does say that 1 piece of baggage is included. I ended up paying ~$20 to add a bag to my ticket, but would be interested to hear about your experience. In the meantime, I have updated the article.