This article attempts to explore the use of the Fractional-Order Proportional Integral Derivative (FOPID) controller in the ideal design of the Automatic Voltage Regulator (AVR), taking into account its superior control characteristics and increased tuning flexibility compared to the traditional PID regulator. The tuning method for FOPID is more challenging than that of its conventional equivalent since it has two additional tuning parameters. A self-regulated off-line optimal tuning solution based on the Gradient-Based Optimization (GBO) algorithm is used in the current study to address the mentioned problem. By reducing the chosen Fitness Function (FF), which in the current study is chosen as Integral Time Absolute Error (ITAE), the best FOPID gains can be realized. The outcomes demonstrate that, among the AVR designs taken into consideration, the proposed AVR design offers the most ideal dynamic response and improved stability, demonstrating its effectiveness and significance.