/usr/share/gretl/scripts/ps7-2.inp is in gretl-common 1.9.6-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3
# PS7.2, for Example 7.1 open data7-2 ols WAGE const GENDER EXPER