As far as I know, you can't get a "gift url" for gifts brought through steam. You will need either an e-mail to send the gift to, or a friend to trade with. If you buy the game through another retailer though, you will get a steam key which you can then PM or leave in a thread for ninjas. It might be possible to turn a key to a url, but I'm not sure exactly how (take a look at the ninja thread, there should be an example or two there).

That's exactly what I am trying to avoid, my intention was just to post a few keys here on the forums and forget about it. I couldn't find any instructions around the net and nobody here seems to know either, so I'll just assume it isn't possible.

Thanks anyway. :)

Distinguish reality from virtual reality and win a prize:

http://www.gog.com/en/forum/general/contest_distinguish_fantasy_from_reality_and_win_a_free_game

[signup] Picture Pong: Creative Team Contest:

http://www.gog.com/en/forum/general/signup_picture_pong_creative_team_contest/post1

Fantasy VS Reality (Round 2)
http://www.gog.com/en/forum/general/contest_fantasy_or_reality_round_2

Something Giveaway:

http://www.gog.com/en/forum/general/something_giveaway/

Should I stay or should I go ... another giveaway:
http://www.gog.com/en/forum/general/should_i_stay_or_should_i_go_another_giveaway

Spain: Sold out:

http://www.gog.com/en/forum/general/spain_sold_out/

Who wants some Wang? (Shadow Warrior Giveaway):

http://www.gog.com/en/forum/general/who_wants_some_wang_shadow_warrior_giveaway/

Should I stay or should I go ... another giveaway:

http://www.gog.com/en/forum/general/should_i_stay_or_should_i_go_another_giveaway/post1

Random June Giveaway!:

http://www.gog.com/en/forum/general/random_june_giveaway

New Star Soccer 5 giveaway:

http://www.gog.com/en/forum/general/new_star_soccer_5_giveaway

---

A Torch Made of Light Giveaway:

http://www.gog.com/en/forum/general/a_torch_made_of_light_giveaway/post1

Giveaway for "Lugaru HD":

http://www.gog.com/en/forum/general/giveaway_for_lugaru_hd/post1

Indie Gala V giveaway:

http://www.gog.com/en/forum/general/indie_gala_v_giveaway/post1

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CONTEST: Fantasy or Reality (round 3):

http://www.gog.com/en/forum/general/contest_fantasy_or_reality_round_3/post1

[Giveaway] Resonance:

http://www.gog.com/en/forum/general/giveaway_resonance/post1