Company Profile. Overview Gibson Mechanical Design is a specialist design, engineering and drafting firm located in Gladstone, Central Queensland. For over 20 years, we have provided comprehensive brown field support for the growing needs of Australia’s mining, industrial and infrastructure operators. As an engineering and design firm, GMD works in a diverse spectrum of engineering areas, though we mainly specialise in the structural and mechanical disciplines. Our origins are in machinery and equipment for the manufacturing and mining industries.