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This paper presents control of non linear Two Tank Conical Interacting System (TTCIS) using Gain Scheduling Adaptive Controller (GSAC). This TTCIS is considered as two tank benchmark setup for interacting non linear systems. The transfer function of TTCIS was derived and the relationship between TTCIS parameters and PI controller parameters were derived for implementing GSAC for TTCIS. Two cases namely multiple linear models of TTCIS with as many PI controllers and nonlinear TTCIS model with GSAC were considered. The Genetic Algorithm (GA) was used to obtain the optimal PI control settings in first case. The experimental setup for TTCIS was designed and fabricated. The simulation and experimental studies were carried out for all the two cases on a benchmark TTCIS. The advantages of Gain Scheduling Adaptive Controller over GA tuned multi PI controllers were highlighted.