ɡˈɪljəm ɡɹˈædjuːˌeɪɾᵻd fɹʌm wˈʊdɹaʊ wˈɪlsən hˈaɪ skˈuːl ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti sˈɪks ænd wʌz ɪndˈʌktᵻd ˌɪntʊ ðə skˈuːlz hˈɔːl ʌv fˈeɪm ɪn tˈuː θˈaʊzənd fˈoːɹ.
Gilliam graduated from Woodrow Wilson High School in 1956 and was inducted into the school's hall of fame in 2004.