The proposed work provides an insight about the practically possible beam misalignment in the gyro-devices. The misaligned beam interacts differently with the induced wave in the cavity. The effect of the shifted guiding center of the misaligned beam on the device performance has been analyzed and then compared with an experimental three cavity gyroklystron. This study shows that increment in the misalignment in terms of radial shift, leads to the decrement of the power, gain and efficiency of the device. The sharp decline in the efficiency and gain curve highlights that it is highly sensitive to radial displacement, where even minor shifts lead to a considerable reduction in performance. The minor shift in the resonant frequency and bandwidth has been noticed while changing the misalignment parameter.