I have not, but I will share this, Viv.
I had strep, full-on, while in college. I was interested in a young woman at the time, who was ... let's say, a little "boheme" ... and she, all fear aside, had me eat some raw grapefruit peel, about 1/4 of a full ruby-red, and the next day i rebounded like you wouldn't believe.
That incident sort of changed my view of the power of citrus fruit. I wouldn't doubt if GSE could impact GSE. It's this kind of creative idea that always piques my interest. I usually expect these wild ideas to come from Martin :)