Ground penetrating radar (GPR) has been a pioneering electromagnetic tool for detecting and locating subsurface objects with high imaging fidelities [1, 2]. The main defocusing effect in the GPR imagery is occurred due to the well-known hyperbolic distortion of the subsurface scatterers in the resultant space-time B-scan GPR image [1-3]. Although many migration/focusing methods have been proposed by various researchers, the focusing problem in the measured GPR images remains to be a challenging task. In this work, we review the recent migration methods of the B-scan GPR images that are popular among the GPR researchers. These methods are the hyperbolic summation (HS), the Kirchhoff migration, the f-k migration and the SAR-based focusing techniques. The brief formulation of these methods together with their algorithms is presented. The applications of the algorithms to both the numerical and the measurement data are provided and the corresponding B-scan focused GPR images are presented.