/usr/share/gamgi/dat/cluster/ is in gamgi-data 0.17-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gamgi/dat/cluster/H2O.xml
/usr/share/gamgi/dat/cluster/c476.xml
/usr/share/gamgi/dat/cluster/c60.xml
/usr/share/gamgi/dat/cluster/ccc111.xml
/usr/share/gamgi/dat/cluster/ccc211.xml
/usr/share/gamgi/dat/cluster/cfc111.xml
/usr/share/gamgi/dat/cluster/cfc333.xml
/usr/share/gamgi/dat/cluster/cs111.xml
/usr/share/gamgi/dat/cluster/dna.xml
/usr/share/gamgi/dat/cluster/hs.xml
/usr/share/gamgi/dat/cluster/line3_a.xml
/usr/share/gamgi/dat/cluster/line3_b.xml
/usr/share/gamgi/dat/cluster/line8.xml
/usr/share/gamgi/dat/cluster/pbc1.xml
/usr/share/gamgi/dat/cluster/pbc4.xml
/usr/share/gamgi/dat/cluster/pbc5.xml
/usr/share/gamgi/dat/cluster/pbc6.xml
/usr/share/gamgi/dat/cluster/pbc8.xml
/usr/share/gamgi/dat/cluster/plane11_a.xml
/usr/share/gamgi/dat/cluster/plane11_b.xml