Several studies on literacy show a contrariety against data concerning the literacy rate of Indonesians. Indonesian students are considered literate but unaccompanied with absolute literacy abilities. In tackling this problem, the Ministry of Education and Culture designed a School Literacy Movement/Gerakan Literasi Sekolah (GLS) program to increase students' literacy. GLS is a unique program developed for the school systems from the primary to high school levels. The presence of a school library and librarian is an essential element in implementing GLS. Librarian is part of the School Literacy Team, collectively working with the school principal, student guardians, parents, and teachers. By employing a quantitative-descriptive method to investigate school librarians' role, this study intends to assess librarians' role in implementing GLS in schools as teachers, leaders, instructional partners, information specialists, and program administrators. Using purposive sampling, the respondents are librarians who have implemented GLS in East Java in their workplace. The questionnaire was distributed through Google form with a total of 124 respondents. The results showed that the average score of a librarian role in implementing the GLS program was very high (4.32). The lowest average score went to the librarian as an information specialist (4.17), and the highest one belonged to the librarian as program administrator (4.49). The average score of a librarian as a teacher was 4.31, while as a leader and instructional partner were 4.31 and 4.34, respectively.