The judgment creditor has the right to conduct an asset hearing.
This hearing will be conducted under oath and you are required to answer truthfully. They will ask about all your assets. They will also ask about any assets previously transferred to any third party.
These bonds may or may not be assets exempt from attachment in your state. If not exempt, the court could easily order you to turnover the bonds to the creditor.
I don't what the rules are in your state for "fradulent conveyance". In most states, any transfer of an asset to a family member in the past 12 months is deemed to be fradulent and the court can "unwind" the conveyance. Given that caveat, you might just have your name removed from the bonds.
When you say bankruptcy is not an option, are you sure? Have you actually spoken with a bankruptcy attorney? Most bankruptcy attorneys will give you a free initial consultuation to see if it is a good fit.