The simple answer is yes, all the fonts included in the Google Fonts library are released under licenses that allow you to use them for free, in both commercial and personal applications.
The open source fonts in the Google Fonts catalog are published under licenses that allow you to use them on any website, whether it’s commercial or personal.
https://developers.google.com/fonts/faq
More specifically, the fonts use one of three license types:
All three licenses place very little restrictions on how you can use the fonts. The primary restrictions are based around redistribution.
A key requirement is that if you distribute the fonts, you must also include the original license files.
You must give any other recipients of the Work or Derivative Works a copy of this License; and
You must cause any modified files to carry prominent notices stating that You changed the files; and
You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and
http://www.apache.org/licenses/LICENSE-2.0
It’s also important to not distribute modified versions using the original name:
The Original Version must retain its name, unmodified.
https://www.ubuntu.com/legal/font-licence
Modified Versions which are Substantially Changed must be renamed to avoid use of the name of the Original Version or similar names entirely.
Lastly, the OPEN FONT LICENSE prohibits selling the fonts by themselves:
1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself.
https://github.com/google/fonts/blob/master/ofl/abeezee/OFL.txt