Well I've updated my AppImage to include the changes I think you want (as I won't know until you actually give me more details like the list of geany plugins dependencies on CentOS 7) https://bintray.com/fusion809/AppImages/Geany#files. I tested it on Arch Linux and it works on there now. It also works on Fedora 24, so @b4n was right about those libraries.
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