Gerardo Delgado is identified from the beginning of his long career with these new values, caring for a work look constructivist and formal, defined by compositions that develop structures and modules of the vivid colors and whose repetition of elements provides a great visual rhythm to each composition. In these first and decisive years Gerardo Delgado was interested in the involvement of the public in the artistic experience, in the relationship between work and spectator. Were the years in which it was a part of two historical facts of the period's art that will definitely marked: the Seminar of Automatic Generation of Plastic Forms of the Computation Center of the University of Madrid and the Meetings of Pamplona, 1972. As you progress the decade of the seventies, Gerardo Delgado is evolving towards more and more complex and conceptual, performing installations of large canvases hanging from the ceiling that generated spaces envelopes . At this time shows his work in galleries Juana de Aizpuru of Seville and Lolas Velasco Madrid, as well as at the Miró Foundation of Barcelona and in the Palacio de Cristal in Madrid.

In the eighties, the artist gives us a twist to your work, focusing on aspects most immediate and introducing figurative elements which tend to a certain expressionism, a fact that accentuates the middle of the decade when entering in your paintings found objects. The series features these years are "In the white city", "The Prophet", "The Ruins" and "The Archipelago". In these years he has exhibited in galleries Montenegro and Egam of Madrid, Miguel Marcos Zaragoza and Joan Prats, Barcelona. Participates in the "Aperto 86" of the Venice Biennale and at the opening of the halls of the Canal de Isabel II in Madrid.

The decade of the nineties is a very fruitful in terms of important exhibitions and series of paintings. Showing his works at the Museum of Contemporary Art of Seville and in the Episcopal Palace of Malaga, as well as in the Palace of the Dukes of Granada. Include the series "self-Portrait: the artist in the window" and, especially, "Paths", work fully abstract and very structured, which creates paths and itineraries blurred by the use of the black, "which encourage us to walk and get lost in the twists and turns of the labyrinth", according to the words of Gerard. In the nineties he exhibited in the gallery Gamarra and Garrigues of Madrid, in the galería Fúcares of Almagro and the Banco Zaragozano. In the last decade in Miracles Delicate of Cadiz, as well as in the Museum and in the College of Architects of the latter city. Also in the room Robayera of Miengo. At the MACBA in Barcelona, and in the Center Warrior of Granada. In Madrid, exhibiting in the gallery Antonio Machón.