GCC ACQUIRES STAKE IN BOLIVIA'S SOBOCE

International Expansion Key to GCC Growth

Chihuahua, Chih., Mexico, September 26, 2005

("GCC" or "the Company") (BMV: GCC*), a leading cement producer in Mexico and the United States, today announced its acquisition of a 46.57% stake in Sociedad Boliviana de Cemento, S.A.

("SOBOCE"), the largest cement company in Bolivia. With annual cement production capacity of 870 thousand tons, SOBOCE operates two cement producing plants and two cement milling facilities, four ready mix concrete plants and a limestone aggregates plant throughout Bolivia. Cement sales volumes have grown a compounded 9.39% in the past four years. Net sales in fiscal 2004 totaled US$54 million. SOBOCE also holds management control and a one-third ownership stake in Fábrica Nacional de Cemento(FANCESA), the second largest cement producer in Bolivia with a 444 thousand tons of cement production capacity, one ready mix concrete plant, one limestone aggregates plant and three precast concrete products plant; the combined national market share of Soboce and Fancesa is approximately 70%, with total annual sales of US$83 million.

The acquisition is GCC’s entry into the South American market, and represents an important growth opportunity for the Company. Demand for cement in Bolivia has grown at 4.7% on a compounded basis in the last four years (compared to 2.6% GDP growth in the same period), and is forecast to increase significantly, due to investments in highway and public infrastructure, mining and housing, while the self-construction industry should continue to reflect solid GDP growth.

GCC agreed to acquire its stake in SOBOCE for US$58.2 million in a cash transaction. The remainder of SOBOCE’s equity capital will be held by its current shareholders. SOBOCE will be an affiliated company of GCC, whose financial results will be consolidated in GCC’s reporting on a proportional basis of the 46.57% ownership.

Key Benefits of Acquisition:

GCC believes that the acquisition will:

• Provide GCC with a diversified source of revenue and earnings, and a platform from which to expand its presence inSouth America
• Establish GCC as the market leader in Bolivia, where GDP growth and demand for cement have shown attractive historical growth and are anticipated to increase at a robust rate
• Provide SOBOCE with industry expertise to improve production efficiencies
• Maintain comparable operating margins while boosting EBITDA levels

"GCC’s expansion into South America is an important strategic development for the company’s growth. Through SOBOCE, we will be the market leader in a fast-growing economy and gain a foothold in the wider region, while utilizing our strong balance sheet to enhance shareholder returns," said Manuel Milan, Chief Executive Officer of GCC.