/usr/share/gromacs/top/ffG53a5.itp is in gromacs-data 5.0.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | #error This top-level .itp file has been removed. Edit your topology to include it from your force field directory instead, e.g. "gromos53a5.ff/forcefield.itp" etc.
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