#!/bin/bash

curl -Ss 'http://www.gust.org.pl/projects/e-foundry/tex-gyre/whole/' | \
  tr '/"' '\n' | \
  sed '
    s/^tg\([0-9_]\+\)otf.zip/\1/
    y/_/./
    t
    d
  ' | \
  sort -V | \
  tail -n1