Ginko's been claimed to be memory loss/dementia preventing. Mixed bag there on the research (some research indicating so, some not...)- but they DO know it has an impact on healthy individuals by boosting attentiveness considerably through it's ability to inhibit norepinephrine uptake. I'd say it'd help in remembering things because of that aspect.
Would you have a reference, regarding Gingko having an impact on healthy citizens? I've done some research in the past and found no study saying that.