ðə kənstɹˈʌkʃən ʌvðə ɡˈɑːɹnɪt vˈæli hˈaɪ skˈuːl bɪɡˈæn ɪn mˈeɪ nˈaɪntiːnhˈʌndɹɪd sˈɪksti tˈuː, ænd ðə skˈuːl wʌz ˈoʊpənd ɪn sɛptˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd sˈɪksti θɹˈiː.
The construction of the Garnet Valley High School began in May 1962, and the school was opened in September 1963.