Death2Videodrome: i only made 1 Darwinia giveaway for this group but Steam somehow made 2 separate giveaways for game without my knowledge...
I'm sorry to read that, I hope you get well really soon. As for the giveaway, were there two Darwinia giveaways made (supposedly) by you? Maybe you were so sick that you didn't notice you already did one, or it was a glitch in the system. Anyway, maybe this can be easily fixed by contacting the SteamGifts admins explaining the situation, but maybe that will leave you with a "gift not delivered" mark, and we don't want that to happen.
We are all friends here and I supposed the giveaway was made between GOG members. I'm sure we can get an agreement. I would give you a Darwinia key if I have one, but I don't... sorry :( , but maybe someone else has it and can give it to you, so you can give that to the winner, OR you can contact the winner explaining the situation, maybe he/she can understand (I would), OR you can offer him/her a different game. The idea of these solutions I thought is for the winner to mark the gift as received. If you need a different game to offer him/her, I have any game from the IndieGala Magicka and I can give you a key (free/no trade needed) to help you with this problem. At least you can offer him/her one of these games: Trine, Cities in Motion, Magicka, Magicka Vietnam DLC, Painkiller: Black Edition, Deponia, Home and Victoria II.
That's all I can do to help you. But I'm sure someone else will also try to help you too.
Cheers, and get well soon. Let me know about any news of your problem :)