Hey Rabex ,
Thanks for reaching out. Buttonizer is GDPR compatible as you can turn off loading in icons 🙂
If you already have FontAwesome on your site, make sure to go to the settings in the editor, then go to Icon library
and disable Import icon Library
.
This should disable loading in the icons on your site using Cloudflares public CDN and you can use your own source.
Let me know if this helps 🙂