At 1% and 5 wt.% GNP coated glass-carbon/epoxy composites, the flexural stress was found to be ~420.2 and ~396.9 MPa, respectively, which are ∼12.1% and ∼6% higher compared with that of the glass-carbon/epoxy composite. The increment of flexural stress with the 5% GNP coated composite was less pronounced in comparison with that of the 1% GNP coated composite. This might be due to the agglomeration of GNP at the interfacial region, which generates stress concentration and hence reduces the strength at the interface. A higher flexural strain of ~3.9% was observed with 1 wt.% GNP coated glass-carbon/epoxy composite, which is approximately 26.6% higher compared to the control specimen. This enhancement of flexural stress and strain with GNP coated glass-carbon/epoxy composites is likely due to the wrinkled structure of GNP that is attached to the fibre surface by mechanical interlocking, which improves the fibre matrix interactions and forms a link between the glass-carbon fibre layer. Therefore, the strong GNP/fibre/matrix interfacial interactions created from the randomly distributed GNP at the interface facilitate smooth load transfer to glass fibre after carbon fibre failure, thus contributing to higher flexural stress and strain as well as pseudo-ductility.