Spanish magazine km77.com has revealed photos of the Opel GTC Concept (not to be confused with the Astra GTC Concept unveiled in Geneva 2003) which is set to debut in Geneva in a few days. There seems to be some general confusion if this is the new Vectra concept that has been rumored for weeks. However, km77.com believes this GTC concept gives exterior and interior design hints for the new Vectra as well as future models in the Opel lineup. Responsible is Executive Director of Design for Opel, Bryan Nesbitt, who has worked on such projects as the Pontiac Solstice, Pontiac G6, Cadillac DTS and BLS, Buick Lucerne, Chevrolet Impala, HHR and Cobalt coupe, Saturn Aura and Sky, GMC Acadia, Saturn Outlook and Buick Enclave adds this latest rear-wheel-drive coupe to his resume. Stay tuned for further details. More photos after the jump.