Tunisia is a leading country, worldwide, as far as natural phosphate and mineral fertilizers are concerned. Compagnie des Phosphates de Gafsa (CPG) has been active in mining for more than a century. The activity of  ore benefeciation and production of various mineral fertilizers is more than  half a century old. CPG operates seven open cast quarries and one underground mine. Annual production of merchant phosphate in 2007 reached 8 millions, placing Tunisia the fifth in the world for phosphate production. After having been exporting all its phosphate rock production during the first fifty years of its activity, Tunisia entered successfully into phosphoric acid and mineral fertilizers production and developed this new activity so that Tunisia is now processing more than 80% of its phosphate production.

GCT owns 4 industrial sites located in SFAX and M'DHILLA (for TSP), GABES (for Phosphoric Acid, DAP, DCP and AN) and SKHIRA (for Phosphoric Acid).

The phosphatic field holds an important position within the Tunisian economy both in labour level and in trade balance worldwide. The Tunisian phosphate industry is fifth amongst the international operators in the field. Natural phosphate and its by-products (Phosacid, DAP, TSP, DCP...) are exported to 50 countries in 5 continents.

In 1994, The Tunisian government merged the chairmanship of CPG and GCT appointing the same chairman.

In 1996 the government ordered a single common commercial Direction. The merger brought greater efficiency to the sector.