Present study executes a thorough enquiry of tailoring a few important nonlinear optical (NLO) properties of GaAs quantum dot (QD) by invoking Gaussian noise-anharmonicity interplay. The NLO properties enquired are total optical absorption coefficient (TOAC), total optical refractive index change (TORIC), nonlinear optical rectification (NOR), second harmonic generation (SHG), third harmonic generation (THG), DC-Kerr effect (DCKE), electro-absorption coefficient (EAC), group index (GI) and optical gain (OG). The mode of entry of noise (additive/multiplicative) to the QD, in conjunction with the symmetry (odd/even) of the anharmonicity, design the above NLO properties. These NLO properties have been found to be endowed with regular rise, regular decline, maximization, minimization and saturation. The findings of the study emerge quite prolific owing to the profound technological need of QD, particularly when it consists of anharmonicity and under the influence of noise.