The subject of this study is to investigate the effect of cross-sectional geometry on the flexural and compressive strength of glass fibre reinforced composite profiles used for various purposes. In order for this comparison to give accurate results, profiles with equal cross-sectional area were divided into two groups and bending and compression tests were performed. Force-Displacement graphs of the obtained data were prepared and evaluations were made. In the first group of 330 mm2 cross-sections, the most suitable profile in terms of bending force/displacement ratio was found to be circular section profile, and in the 700 mm2 cross-section, the most suitable section in terms of bending force/displacement ratio was found to be angle profile. In the first group of sections with 300 mm2 cross-sectional area, it was seen that the most suitable profile in terms of compression force/displacement was serrated circular section profile, and in the 700 mm2 section, the most suitable profile in terms of compression force/displacement ratio was U profile. In this study, when GRP profiles are evaluated in terms of cost and lightness; it has a 30% price advantage compared to its metal counterparts and being 5 times lighter is the most powerful aspects of GRP profiles.