a grantor trust is ignored (disregarded) for income tax purposes. the transfer of assets from it to personal accounts raises no tax issues. whatever the stock basis was in the grantor trust that's your tax basis in the new account. you'll have to watch this because many brokers will transfer in the security at market value on the date of transfer so if you were to sell the gain/loss it reports would likely be different from your actual gain/loss. you should talk to the broker about allowing you to supply the cost basis to be used.
