Note that the font is not free. From the fine print: Use by more than 25 Users, or equivalent Website Visitors, is a breach of this Free Licence Agreement, and instead requires a commercial licence.
About the license - you are correct. I was under the impression this font was already distributed via Google Fonts, but I was wrong.
It's a very nice font, and just costs $67.00. But it could also be swapped for a font with a less restrictive license.
Note that the font is not free. From the fine print: Use by more than 25 Users, or equivalent Website Visitors, is a breach of this Free Licence Agreement, and instead requires a commercial licence.