alerque [1] filed a deletion request for gurk-bin [2]: This package exists in [extra] as a prebuilt binary and I don't see any justification for needing a -bin package at all. Probably left over from when the gurk package was a source build in the AUR.
[1] https://aur.archlinux.org/account/alerque/ [2] https://aur.archlinux.org/pkgbase/gurk-bin/