GTO wizard uses overbets in their solutions all the time. When you are setting up a solution now, like in PIO or Monker, you have to add in geo sizing, 125%, 200% and all in as an option to get a more accurate solve. GTO W does have these.
For example here on the turn:
200% pot bet is the second most used sizing in this solution.
Now if your opponent overbets when he is not supposed to overbet, you need something like Monker or PIO to node lock that spot to make him use some hands in that sizing that wouldn't be there normally.