Slab on Ground (SoG) is a structural floor element constructed directly on the ground surface. Cracking in SoG may occur when tensile stresses exceed the concrete’s tensile capacity, necessitating reinforcement to control crack propagation. This study investigates the performance of Glass Fiber Reinforced Polymer (GFRP) mesh compared to wire mesh in terms of crack patterns, crackwidth, and strain behavior. Concrete slab specimens (950 × 350 × 60 mm) were tested, each with a single reinforcement layer and 27 mm concrete cover.Three specimens used GFRP mesh; three used wiremesh, with concrete strength f’c = 25 MPa and subgrade California Bearing Ratio (CBR) of 8.06%. The slabs were subjected to static loading through two line loads spaced 300 mm apart until reaching a maximum load of 34.81 kN. Cracks were visually observed, measured with a crackmeter, and reinforcement strain was recorded using strain gauges. GFRP-reinforced specimens exhibited initial cracking at 20.07 kN, slightly lower than the 20.99 kN observed in wiremesh specimens. However, the initial crack width was smaller in GFRP specimens (0.45 mm) compared to wiremesh specimens (0.55 mm). Although statistical analysis showed this difference was not significant, it demonstrated consistent practical trends for better crack control. Strain measurements showed GFRP experienced higher maximum strain, attributed to its lower modulus of elasticity. It indicates greater flexibility in the elastic range, although GFRP’s brittle nature restricts post-peak deformation. These findings highlight the trade-offs between flexibility and ductility when using GFRP reinforcement in SoG applications.