Halliday & Matthiessen (2014: 226, 226n):
Note that ‘Goal’ refers to the goal of impact — the participant construed as being impacted by the Actor’s performance of the process (this term is also used by Dik, 1978: 37, in his framework of ‘Functional Grammar’: ‘the entity to which the Action is applied by the Agent’). This sense of the goal of impact is distinct from (though obviously ultimately related to) the sense of destination — the destination of a process of motion, as in the goal of a journey.