This free fonts are part of the Helsinki font family which is available for purchase on this website.
The Helsinki free fonts cover the Western and Central European character set and come for desktop and web. To use the fonts, simply install the TTF files on your system. To use in your online projects WOFF and WOFF2 files are also included. The fonts contain an alternate character g accessible via Stylistic Sets 01 or Stylistic Alternates.
Please visit also the Helsinki font family page.