- GUG, an abbreviation for "Generic UTC Greeting". (See List of Internet slang)
- GUG, GIMP USER GROUP
- GuG, Groupe Utilisateur Garneau
- Gugs, fictional giant creatures in the Dreamlands, a fictional world part of H.P. Lovecraft's Dream cycle.
- Gugulethu, nicknamed Gugs, South African township
- The Times Good University Guide, information and league tables on British universities
- gay until graduation, a variant of lesbian until graduation