G.C. Zarnas & Co. 850 Jennings St, Bethlehem, PA18017 G.C. Zarnas & Co. is a company specializing in fireproofing and waterproofing, painting and specialty coating. G.C.…More Zarnas & Co. also offers abatement services such as the removal of asbestos and mold remediation, among others. Staffed by experienced and knowledgeable contractors, with options for industrial and commercial properties, G.C. Zarnas & Co. strives to protect and maintain its clients' investments. G.C. Zarnas & Co. was founded by former NFL Chicago Bear Gust C. Zarnas.