Do you think that Graphic Design is a true form of art?

No graphic design is not "art." Art is normative, stand alone and intent based. Art stands by itself as a means to a broader discussion of social political, intellectual and aesthetic issues. Graphic design on the other hand may employ social, political, intellectual and aesthetic means, but functions solely to support market advertising, a separate purpose superior to its existence in and of itself. Unlike art graphic design does not seek to instigate or generate discourse on the nature of graphic design. It seeks to lure and attract attention or market share to goods and/or services and information resources through the simplest and most direct means of psychology, color and symbol possible. Art seeks to focus the intellect on to the art object itself to generate discourse based on and directly referential to that art object and by extension on the larger stream of art history. Though highly sophisticated and often, by definition of purpose "attractive" in its methods and means graphic design ultimately stands only as a subordinate servant to a product or service other than itself.