Hello,
Sorry for the issue with the Google Fonts on your site. You should be able to use the Font options within BoldGrid to change the fonts. As it is, BoldGrid has its own system for font CSS. The only way to put in a different font system would be to change the code. As BoldGrid is a plugin for WordPress, you may want to try using a plugin for Google Fonts first, though. If the problem persists, then please let us know what you’re doing and then the BoldGrid team can look into it further.