Using FA as a CDN is not GDPR compliant, either.
Generally speaking using any public CDN is not GDPR compliant. If you _could_ self host the files, then you can not meet the necessity test required for any of the relevant legal basis in GDPR art 6(1).
Google Fonts and FA are worse, because the personal data is shipped off wholesale to the USA. Neither FA or Google (for fonts) offers a data processing agreement that would make it legal to use.
They provide the tools to bundle the fonts and serve them yourself:
https://fontsource.org/fonts/merriweather-sans
Will update original comment.
> The disclosure of the user's IP address in the above-mentioned manner and the associated encroachment on the general right of personality is so significant with regard to the loss of control over a personal data to Google, a company that is known to collect data about its users, and the individual discomfort felt by the user as a result, that a claim for damages is justified.
[0] https://rewis.io/urteile/urteil/lhm-20-01-2022-3-o-1749320/
The user likely has no idea they contacted Google — it only happened because the code in your application executed it.
The reasoning was that as it is so very easy to self host Google fonts and with caching as an argument gone there is actually not enough reason anymore to use the hosted version by Google and transmit PD to Google.
Would the site have used a foundry that didn't offer self hosting the reasoning might have turned out differently if the site owner could have made a strong argument for using this specific font by this foundry.
At least that was my reading but IANAL.
Your website is malware that contains code which makes the visitor's browser connect to Google's server.
Though it arguably doesn't get enforced anyways, except for some big corps.
It doesn't often really work out that way.
Tax Law is especially interesting here, because you can basically depend on what the IRS has said but there's a chance that even if they said X, the tax court will actually rule Y (in your favor). Sometimes the risk can be worth it (if you made a good-faith effort to comply with a reasonable understanding of the law, and the court rules against you, you just have to pay the tax; even if you were found unreasonable you pay the tax + penalty which often isn't that much).
It's not even clear if using Google Fonts is GDPR compliant (since you're leaking the fact that your visitor has visited your website): https://github.com/google/fonts/issues/1495
Even if you do want to use your own hand-picked font on your site, just self host it, or bundle it with something like https://fontsource.org/
They provide the tools to bundle the fonts and serve them yourself: https://fontsource.org/fonts/merriweather-sans
EDIT: The original comment mentioned "fortawesome" instead of "fontsource". I mixed up the names, my bad!