In this study we propose a new CAPode based on nanostructured hexagonal tungsten oxide (h-WO3) and G-Cap architecture employing biocompatible electrolytes including Li2SO4, Na2SO4, K2SO4, MgSO4, and H2SO4 (the latter is used for the fundamental studies). Electrochemical techniques such as Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS), are used to evaluate and optimize the device performance. Specifically, we investigated the effects of mass loading ratio, electrolyte concentration and electrolytes on the device response. The proposed devices demonstrate much higher rectification ratios compared to those reported in the literature exhibiting excellent logic operation for simple AND and OR gates and more complex logic gates by using six devices for logic operation. Furthermore, the switchability of the proposed device is tested and demonstrates the appropriate functionality for iontronic applications.