Translations:Research:Global South User Survey 2014/Questions/2/qqq
"Pays du Sud" is the only roughly equivalent expression to the geopolitical concept of "Global South" but note that, at least in French, it tends to be considered at least somewhat pejorative and is often frowned upon.
A possible alternative might be "pays en voie de développement" which is less precise, because it does not normally include the poorest parts of the "Global South" ("pays les moins avancés") but is less pejorative.