This paper aims to investigate the effect of transverse reinforcement on the bond strength of ribbed GFRP bars in concrete. To achieve the objectives of this research, 18 pullout specimens, including 6 without transverse reinforcement and 12 with transverse reinforcement, were cast and tested. Ribbed GFRP bars of No. 5 (15.9 mm diameter) and No. 8 (25.4 mm diameter) were used for this experimental investigation. Two cube sizes of 200 mm and 300 mm were cast in this study. Seven times the bar diameter was considered the embedded length of the bar in concrete. For transverse reinforcement, reinforcement cages were utilized, equipped with steel stirrups spaced at intervals of 50 mm and 75 mm. During the test, the load and bar slips were recorded. The experimental results were analyzed and discussed in terms of load capacity and bond-slip behavior. The presence of transverse reinforcement was generally observed to have a small effect on enhancing bond strength. The presence of transverse reinforcement has a minimal effect on the stiffness and chemical adhesion of specimens with the same bar diameter. A significant increase in both maximum load and bond strength is observed as the dimensions of the concrete block increase from 200 to 300 mm.