This doesn’t mean you suddenly have to stop using fonts from Adobe Fonts and Google Fonts. If used correctly, you can still stay within GDPR regulations, though it may not be as seamless as before.
Neither Adobe Fonts nor Google Fonts place any cookies on your website. However, they are font services that provide an API to deliver font files to you. To provide the fonts to your website, they collect user requests, fetch the files from their servers, and deliver them to the end-user so the fonts can be rendered in the browser. During this process, Adobe’s and Google’s servers register the user's IP address, which may be located outside the EU. And this is where the GDPR issue arises.
Collecting personal information, which could be shared with third-party services, without consent violates GDPR. Since an IP address is considered personal information, you must ask for consent before displaying the fonts to your website visitors.