A Systematic Study of Model Extraction Attacks on Graph Foundation Models. - Haoyan Xu; Ruizhi Qian; Jiate Li; Yushun Dong; Minghao Lin; Hanson Yan; Zhengtao Yao; Qinghua Liu; Junhao Dong; Ruopeng Huang; Yue Zhao 016; Mengyuan Li (CoRR, 2025)