Study Mode - > Select solution (top-left)
Assuming you need 100bb cash, select these settings:
Then navigate the game tree using this bar at the top of the page:
You can find more in the "preflop only" menu
Keep in mind only the 100bb cash are free. Deep/short stacks require a subscription.
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Here are the guides:
https://help.gtowizard.com/study-mode/