Yes if you want to level up your game studying GTO along with everything else will help your game. It helps get a baseline on your opponent so you can help find the mistakes in their game.
For me studying GTO has really helped me. Not the specific ranges to play but the why of the actions I take vs Villains possible range.
GTO teaches you about value targets and why we choose sizing based on those targets.
It also helps with understanding the why of going all-in with hands for 40bb preflop or 3x pot on rivers etc. The kind of thing that is difficult to learn without a solid basis of the why?