This theme component, Compliant Google Login Button, replaces the default Font Awesome Google Icon with a compliant image, as required by Google’s branding guidelines. The component is available on GitHub. To install, follow the Beginner’s Guide to Using Discourse Themes. codinghorror suggests making this the default for all Discourse instances, given Google+'s impending demise.
This is very a small theme component that will modify the Google login button to use a compliant image instead of the default Font Awesome Google Icon.
Thank you for this .. we’ll need to see how often this crops up in our brave new world of Google+ meeting its slow final demise over the next 10 months.
edit: looks like this hit the rule of so we should probably make this the new default for that button, no plugin required, default on all Discourse instances .. can you take it @Johani?