The purpose of this article is to analyze keywords and networks of questionnaire results on the high-school students’ experience of the Global Citizenship Education Curriculum(GCEC) in Korea. It is to find the characteristics of the GCEC from the field of education and suggest the direction of development of the GCEC. This paper analyzed five questionnaire results from 112 high-schools with Atlas.ti 8.4.24 and NodeXL Pro 1.0.1.508 to visualize. The results were compared with students' actual responses to explore the real-world picture of the training site at the GCEC. As a results, students have grew and changed with GCEC, especially topics related to the ‘human rights’ influenced significantly. According to students, the GCEC needs to be connected with students’ daily life for broader understanding, operates as convergence programs at school, calls for the flexibly upon individual school curricular, and holding various joint activities between UNESCO Associated Schools Networks. It is also found SNS was largely used, so there is increasing need for setting up the institutional standards of the online GCEC activity. The high school students in Korea have experienced positive changes while participating in the GCEC. Since the student’s filed experience is valuable, it should be utilized in various ways for the development of the GCEC.