GRP may refer to:

Lee Mack Ritenour (born January 11, 1952) is an American jazz guitarist who has recorded over 42 albums, appeared on over 3000 sessions, and has charted over 30 instrumental and vocal contemporary jazz hits since 1976. One of his most popular songs was the smash hit, “Is It You” in 1981. Ritenour is considered to be a pioneer in the Contemporary Jazz and jazz-funk genres of music.^{[citation needed]}. Guitar Player Magazine awarded him with a Lifetime Achievement Award for the year 2010. His highly acclaimed and popular 2010 hit album Lee Ritenour's 6 String Theory had numerous awards in 2011 including, Guitar Album of the Year – Guitar International Magazine. UK’s Guitarist Magazine: The #1 Best 50 Guitar Albums of 2010. JAZZIZ Magazine Publisher’s Album of the Year. Top Albums of 2010 from Canada’s “The Guardian”. Lee was awarded at the 2011 Echo Awards in Germany (the German Grammy awards) for Best International Instrumentalist (Guitar) in conjunction with the album, 6 String Theory)

Ritenour was born January 11, 1952 in Los Angeles, California. He played his first session when he was 16 with the Mamas & the Papas and given the moniker, "Captain Fingers", because of his manual dexterity on the guitar. Ritenour was a sought-after session guitarist by the mid-1970s, and won Guitar Player Magazine's Best Studio Guitarist twice in the 1970s. He is noted for playing his red Gibson ES-335 and his Gibson L5 guitars.

Robert David "Dave" Grusin (born June 26, 1934) is an American composer, arranger and pianist. Grusin has composed many scores for feature films and television, and has won numerous awards for his soundtrack and record work, including an Academy award and 12 Grammys. He has had a prolific recording career as an artist, arranger, producer and executive producer.

Born in Littleton, Colorado, he studied music at the University of Colorado at Boulder and was awarded his bachelor's degree in 1956. He produced his first single, "Subways are for Sleeping" in 1962 and composed the score to his first feature film, Divorce American Style five years later. Other scores followed including Winning in 1969, The Friends of Eddie Coyle (1973), The Midnight Man (1974) and Three Days of the Condor in 1975.

In the late 70s, he formed GRP records along with his partner, Larry Rosen, and began to create some of the first commercial digital recordings. Grusin was also at the forefront of soundtrack albums. He was the composer for the legendary Mike Nichols Oscar-winning film, The Graduate. The film is noted for being one of the first films to integrate popular songs into a film score. Later scores included On Golden Pond (1981), Tootsie (1982) and The Goonies (1985).

Dave Weckl (born January 8, 1960) is a highly acclaimed jazz fusion drummer. Weckl attended Francis Howell High School in St. Charles, MO and graduated in 1978. He majored in jazz studies at the University of Bridgeport in Connecticut. Starting out on the New York fusion scene in the early 1980s, Weckl soon found himself working with artists such as Paul Simon, Madonna, George Benson, Michel Camilo, Robert Plant and Anthony Jackson. His most famous early work though, where his popularity blossomed, was with the Chick Corea Elektric Band from 1985 to 1991.

Weckl spent a total of seven years with Corea, during which he performed on numerous albums and also appeared with Corea's Akoustic Band. He augmented his work with Corea by continuing his session work and appearing often with the GRP All-Star Big Band. In addition, he recorded four albums in 1988 and 1989 with the Manhattan Jazz Quintet. Weckl has also released a series of instructional videotapes, and in 1990, he led his first solo date, Master Plan, for GRP. Heads Up followed in 1992, as well as Hard-Wired in 1994.