Editor Utility Widget that affects game startup

I would like to make an Editor Utility Wisget that has options that take effect as the game is loading. For example it may have a checkbox “ start with 100 gold” or “ start with this specific weapon equipped” to make testing easier.

The problem is that the game world is not available when the editor utility widget runs its UI, and the game has no way of obtaining a reference to the contents of the widget. My normal method of storing a reference in the game rules or instance is unavailable here. As those have not been created until you start PIE.

How can I do this?

For posterity: The solution I found to this was to store the data in a special save game slot and load that up in the game instance init.