Hi,

how can I implement self-created icons into a Quickfinder?

Your documentation does seem to treat this question http://codex-themes.com/thegem/documentation/#quickfinders

Icon:  

here you can choose an icon from the font icon set you have selected in „Icon Pack“. Just click on “Show icon codes”, select and copy the code of the icon you wish to insert and paste this code here

Merci

G