pabloariasal [1] filed a orphan request for imgp [2]:

The developer of this package, https://github.com/jarun, has contacted me and informed me that the current AUR maintainer can no longer maintain this package. He asked me to take over. There has been a new release and this package is out-dated.

[1] https://aur.archlinux.org/account/pabloariasal/ [2] https://aur.archlinux.org/pkgbase/imgp/