That is true. But beware briefing too much for the sake of briefing. The gravity feed QRH is a straight forward item and there are a thousand other what ifs in this scenario.
Oh the what ifs....... Over briefing can be just as detrimental as underbriefing. Personally I would look at my fuel situation and if needed, state that in the event of a missed approach we may need to consider gravity feeding. Anything more would be surperfluous in my humble opinion.