Glutamic acid lithium sulphate monohydrate crystal is a new semiorganic nonlinear optical material. It was grown from a mixture of aqueous solution of glutamic acid and lithium sulphate monohydrate by slow evaporation technique at room temperature. The powder XRD analysis was carried out to identify the structural parameters of the grown crystals. The presence of functional groups of both reactants was qualitatively analyzed by means of Fourier transform infrared (FT-IR) spectrometer study. In UV-vis study, the existence of wide transparency window and band gap was investigated for optoelectronic device applications. In Kurtz-Perry powder technique, the second harmonic generation (SHG) efficiency of GLSMH crystal is found to be 1.933 times greater than that of KDP crystal.