Alpha particle induced reaction on the two gallium isotopes has been studied in the intermediate energies up to 70MeV.The excitation functions of the six reaction channels were calculated using the semiclassical model computer code COMPLET.The theoretical results arecompared with the experimental excitation functions obtained from EXFOR data source,IAEA. Ingeneral the shape of the theoretical excitation functions were fairly reproduced with the experimental results.The study shows thatat intermediate energy,alpha induced reactions on medium weight nuclei occurs through pre-equilibrium as well as equilibrium nucleus stages.