There's that magic bullet again.
Seriously though, we could send you a document listing those countries that adopted gender-based budgeting and then discarded this approach and explaining what led to that decision. Again, different countries opt for different approaches. For example, Australia ended its experiment with gender-based budgeting for political reasons. South Africa made some changes because it had changed its definition of a budget respectful of the principles of equality.
The only conclusion that can be drawn from this document is that the situation is really not conclusive.