Question: When did the school that Randall Cunningham II attends open?

Context articles: Briggs Cunningham
Randall Cunningham
Doug Scovil
Lara Custance
Vashti Cunningham
Jimmie Giles
Fog Bowl (American football)
Ken Rose (gridiron football)
Bishop Gorman High School
Randall Cunningham II

Briggs Swift Cunningham II (January 19, 1907 – July 2, 2003) was an American entrepreneur and sportsman, who raced automobiles and yachts.
 Born into a wealthy family, he became a racing car constructor, driver, and team owner as well as a sports car manufacturer and automobile collector.
Randall Wade Cunningham (born March 27, 1963) is a former American football quarterback in the National Football League (NFL).
 He played in the NFL for 16 seasons, primarily with the Philadelphia Eagles.
 Cunningham is also known for his tenure with the Minnesota Vikings.
 He is the younger brother of former college and professional football player Sam Cunningham and the father of Randall Cunningham II and world champion high jumper Vashti Cunningham.
 Cunningham was inducted into the College Football Hall of Fame in 2016.
Doug Scovil (June 30, 1927 – December 9, 1989) was an American football player and coach.
 His served as the head football coach at the University of the Pacific in Stockton, California from 1966 to 1969 and at San Diego State University from 1981 to 1985, compiling a career college football record of 45–51–3.
 Following his stint as head coach for the San Diego State Aztecs, Scovil worked as the quarterbacks coach for the Philadelphia Eagles of the National Football League (NFL), where he was credited with developing Randall Cunningham, until his death from a heart attack at Veterans Stadium during the 1989 season.
 In memory of Scovil's passing, the Eagles marked their helmets with black electrical tape for the rest of the season.
Lara Custance (born 20 November 1992) is a New Zealand actress who appeared as Abi in the TV series Paradise Café.
 She is best known for her role as Harmony in The Tribe 'sister' series The New Tomorrow in which she acted alongside her brother Rafe Custance.
 She attended Chilton St James School but took time off school to film for "Paradise Cafe", which is currently broadcast in the UK on BBC and New Zealand television channels.
 She has a little sister called Lily who also attends Chilton Saint James School.
 She now attends the University of Auckland where she is studying a BA/BCom conjoint degree.
Vashti Cunningham (born January 18, 1998) is an American track and field athlete specializing in the high jump.
 She is the daughter of retired National Football League (NFL) quarterback Randall Cunningham, niece of retired NFL fullback Sam Cunningham, and the younger sister of Randall Cunningham II.
 Her mother is Felicity de Jager Cunningham a former ballerina with the Dance Theatre of Harlem.
 Vashti, like her brother two years ahead of her in school, jumped for Bishop Gorman High School in Las Vegas, Nevada until March 2016 when she signed with Nike.
 She announced she will continue her education at a university while competing as a professional athlete.
Jimmie Giles, Jr. (born November 8, 1954) is a former professional American football player who was drafted by the Houston Oilers in the third round of the 1977 NFL Draft.
 A 6 ft , 238 lb tight end from Alcorn State University, Giles played in 13 NFL seasons from 1977 to 1989.
 A four-time Pro Bowl selection, Giles's career flourished as a member of the Tampa Bay Buccaneers during the early and mid-1980s, despite being used mainly as a blocker during several seasons in which he fell into disfavor with the coaching staff.
 Giles' benching coincided with a training-camp holdout, the first in Buccaneers history by a player under contract, and the difficult Doug Williams negotiations that resulted in his departure for the USFL.
 Giles' four touchdowns against the Miami Dolphins on October 20, 1985, tied Earl Campbell's record for the most touchdowns by a Dolphins opponent, and is still (as of 2010) the Buccaneers' single-game record.
 Dolphins coach Don Shula said of the performance, "I can't remember any tight end dominating us that way".
 Buccaneer teammate Gerald Carter said that Giles could have been "one of the best all-time tight ends, if they'd used him more".
 In 1988 with the Philadelphia Eagles, he caught a touchdown on one of the most memorable plays in Monday Night Football.
 Quarterback Randall Cunningham escaped a tackle from Giants linebacker Carl Banks and threw a touchdown to Giles.
In American football, the Fog Bowl was the December 31, 1988 National Football League (NFL) playoff game between the Philadelphia Eagles and Chicago Bears.
 A dense fog rolled over Chicago's Soldier Field during the 2nd quarter, cutting visibility to about 15–20 yards for the rest of the game.
 Philadelphia moved the ball effectively all day and Eagles quarterback Randall Cunningham had 407 passing yards despite the low visibility; but they could not get the ball into the end zone.
 Many players complained that they could not see the sidelines or first-down markers.
 The Bears ended up winning 20–12.
 The game eventually was named #3 on NFL Top 10's "Weather Games".
Kenny Frank Rose (born June 9, 1962) is a former professional American football linebacker in the National Football League for the New York Jets, Cleveland Browns, and the Philadelphia Eagles.
 Rose graduated from Christian Brothers High School (Sacramento, California).
 He attended the University of Nevada, Las Vegas and played alongside Randall Cunningham, among others.
 Undrafted by the National Football League, Ken caught on with the Saskatchewan Roughriders of the Canadian Football League.
 Following two seasons there, he played a season with the Tampa Bay Bandits of the United States Football League.
 However, Rose dreamed of playing in the NFL and attended several training camps in the mid-1980s, only to be rejected each time.
 He received an opportunity with the New York Jets in 1987 during the strike by the players union, and became one of the few "scabs" to stay on the roster when the regular players returned to work.
 Rose remained with the Jets through 1989.
 In 1990, he split playing time with the Cleveland Browns and the Philadelphia Eagles, released by the Browns (along with head coach Bud Carson) after the seventh game and signing with the Eagles for their final 8 regular-season games.
 Rose remained with the Eagles through the 1994 season.
Bishop Gorman High School (also commonly referred to as Gorman High School or BGHS) is a Roman Catholic, private, preparatory school located in Summerlin, Nevada.
 The school is administered by the Diocese of Las Vegas, and has been serving Clark County and the Las Vegas Valley for over 50 years.
 The school opened in 1954 and its mascot is a Gael, or mounted Irish Knight.
Randall Cunningham II, sometimes Randall Cunningham, Jr., (born January 4, 1996) is an American collegiate high jumper for the USC Trojans Men's track & field team who will be a senior during the 2017–18 school year.
 He was a high jumper and quarterback at Bishop Gorman High School.
 He is a five-time Nevada Interscholastic Activities Association (NIAA) state champion (three times in track and twice in football).
 He is a NCAA Outdoor Track Champion and 2-time All-American, U.S. Junior National Champion and Pan American Junior Athletics Championships Champion.