/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/ is in libglib-perl 3:1.305-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Boolean.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Double.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Enum.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Flags.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/GType.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Int.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Int64.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/String.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/UInt.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/UInt64.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Glib/Param/Unichar.pod