I wouldn't ever put my moor in a pond, especially if you're giving it away to someone who already has, for example commons, comets, shubunkins or koi. The moor would starve
And as nabi said, he couldn't escape from the dangers that are included when keeping goldfish in a pond.
Usually pet shops will accept goldfish from keepers who are no longer interested/can't keep them, so you could try asking there
Unless you'd like to upgrade. 40 liters per fish in that case