If I'm reading this (https://github.com/bitcoin/bitcoin/blob/master/doc/assets-attribution.txt) correctly, you are including some GPL icons in the Bitcoin. This would make the whole program GPL. (http://stackoverflow.com/a/47994/613130) unless there are special licensing (unless you have special permissions from the author, but then you should write it).
Icon: src/qt/res/icons/connect*.png Icon Pack: Human-O2 Designer: schollidesign License: GNU/GPL Site: http://findicons.com/icon/93743/blocks_gnome_netstatus_0
Icon: scripts/img/reload.xcf (modified),src/qt/res/movies/update_spinner.mng Icon Pack: Kids Designer: Everaldo (Everaldo Coelho) License: GNU/GPL Site: http://findicons.com/icon/17102/reload?id=17102