Since a marathon performance of Bruch's Kol Nidre, an original arrangement of Ora No Omboko, and his own Bad Rap for Violin and Chamber Orchestra with the Colorado Symphony in 1996, Gregory Walker has charted his own creative course while developing unique collaborations with the Cleveland Chamber Symphony, the Breckenridge Festival Orchestra, the Ft. Collins Symphony, the Yaquina Chamber Orchestra, and the Colorado Music Festival Orchestra, as well as Poland's Filharmonia Sudecka and the Encuentro Musical de los Americas in Havana, Cuba.
A professor at the University of Colorado Denver and McCoy Artist Group soloist, his CRI, Orion, Leonarda, and Albany discography showcases the "precision and rapturous immediacy" described by the American Record Guide. An official NS Design electric violin artist, he has also appeared with pop star Lyle Lovett.
His Electric Vivaldi Newport Classic enhanced compact disc, an interpretation/remix of Antonio Vivaldi's Four Seasons with the Boulder Philharmonic, was released in 2006.
Walker appears on the cover of the April 2007 International Musician magazine.
In 2009, he made his debut with the Philadelphia Orchestra performing on the 1718 "ex- Szekely" Stradivarius, and in 2010 his recording of Pulitzer Prize-winning composer George Walker's Violin Concerto with the Sinfonia Varsovia in Warsaw, Poland was released by Albany Records.
He is currently working with filmmaker Chuck Fryberger on Song of the Untouchable, a documentary film project that will take him to Kerala, India, to perform with Dalit caste musicians.