/usr/share/zoneinfo/Etc/GMT-5 is in tzdata 2016d-0+deb7u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/zoneinfo/Etc/../posix/Etc/GMT-5
/usr/share/zoneinfo/Etc/../posix/Etc/GMT-5