The bond behavior between glass fiber reinforced polymer (GFRP) bars and concrete plays a crucial role in stress transfer, crack control, and the overall performance of reinforced concrete structures. However, many numerical analyses still assume perfect bond between reinforcement and concrete, which may lead to unrealistic predictions of structural response. The main objective of this study is to numerically investigate the bond behavior of GFRP bars embedded in concrete and to evaluate the influence of geometric and mechanical parameters on bond performance. To this end, a three-dimensional finite element model was developed in ABAQUS, in which the bond behavior was explicitly simulated using Bond-Link elements combined with stress–slip relationships. The nonlinear behavior and failure of concrete were modeled using the Concrete Damaged Plasticity (CDP) model. The proposed numerical approach was applied to reinforced concrete columns specimens subjected to cyclic loading, and the results were validated against available experimental data. The numerical findings demonstrate that incorporating bond–slip behavior of GFRP bars, has significant effect on accurately estimating of ultimate capacity of the reinforced concrete structure, in such a way that error of this estimating was reduced to less than 5%, thus the results of this study provide useful insights for the reliable analysis and improved design of reinforced concrete structures incorporating GFRP reinforcement.