Gil Dellinger has participated in over 300 group and one person exhibitions. He is a retired Professor of Art at the University of the Pacific. He has inspired many young artists through his talent for teaching and his own artwork, having won the Distinguished Faculty Award for Teaching Excellence and Professional Contribution in 1990.

A Signature Member of the Pastel Society of America, Dellinger excels in his pastel painting. Painting from life, his work captures majestic landscapes, peaceful pastoral scenes, the drama of the Pacific Ocean, florals, and any scene that catches his eye. His masterful technique is extraordinary. Dellinger feels the chalk is an extension of his heart, and captures his feelings like no other medium. He has been called a "Master Pastelist" by the Pastel Society of America. Dellinger also paints beautifully with acrylic, egg tempera and oils.

He was selected as one of the 22 artists to be invited as guests at the Forbes Chateau in Balleroy, France to paint for a 10 days in 1997. In 1996, he was selected by American Artist magazine as one of 12 artists to paint on the Forbes/Trinechera Ranch near Durango, Colorado which was featured in the January 1997 issue of American Artist Magazine and the works from the event was shown at the Forbes Magazine Building gallery in New York at a special exhibition.

In 1999, Dellinger was one of fifteen artists chosen by the Grand Canyon Trust to raft the Colorado River at the Grand Canyon and paint for ten days. The resulting show of works resulted in an exhibition at Forbes Gallery in New York in January 2001. The exhibit became the centerpiece for articles in American Artist Magazine and Art of the West.