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The holographic phenomena of pole skipping have been studied in the presenceof scalar-Gauss-Bonnet interaction in the four-dimensional Anti-deSitter-Schwarzchild black hole background. Pole skipping points are specialpoints in phase space where the bulk linearised differential equations havemultiple ingoing solutions. Those special points are claimed to be connected tochaos. In this paper, we initiated a novel study on understanding the responseof those special points under the application of external sources. The sourceis identified with the holographic dual operator of the bulk scalar field withits non-normalizable solutions. We analyze in detail the dynamics of poleskipping points in both sound and shear channels, considering linearperturbation in bulk. In the perturbative regime, characteristic parameters forchaos, namely Lyapunov exponent and butterfly velocity, remain unchanged.However, the diffusion coefficient has evolved non-trivially under the externalsource.

Probing Pole Skipping through Scalar-Gauss-Bonnet coupling