Hi,
There is a discussion regarding to GDPR compliance when using Google Fonts in your project: https://github.com/google/fonts/issues/1495
It looks like loading fonts from the Google Web Fonts API might be not compliant with the GDPR because Google collects some data from the visitors of your site.
What are your thoughts regarding to GDPR and Google Fonts?
I always try using Google fonts for fast concept but then I download them and include in my own css. Doesn't take that much time :)
How does it affect your site performance?
There is a possible minor downside that users won't have the font in their cash like it can happen with google font. However it's a tiny bit of the page so doesn't matter a lot + if it's a returning user, he'll get of the benefits of the caching.
Additionally it gives you more control over the fonts and their styling.
You don't always need explicit consent for processing personal data (I'm mostly referring to IP addresses), but you do need very clear and easily available communication.
If you'd like to have a chat about this, don't hesitate to send me an email. I'm making GDPR Wall, so I'd like to hear your thoughts/concerns.
Take a look at my answer on the StackOverflow: https://stackoverflow.com/questions/49250733/google-hosted-fonts-and-gdpr/49318990#49318990