In this investigation a nonlaminated Glass Fiber Reinforced Plastic (GFRP) composite manufactured by pultrusion process was drilled with a coated cemented carbide drill. The thrust force and torque during drilling were acquired through piezoelectric dynamometer. Taguchi?s orthogonal array and analysis of variance (ANOVA) were employed to study the influence of process parameters such as feed and spindle speed on thrust force and torque. The optimum level of process parameters towards minimum thrust force and minimum torque were obtained to achieve defect controlled drilling of GFRP composites. Correlations for thrust force and torque with process parameters were established using a statistical software MINITAB 15. Among the process parameters examined, feed significantly influences both the thrust force and torque with 88.52% and 92.83% respectively whereas the influence of spindle speed on the above was relatively insignificant.