Hi Morran,
There's been discussion about a resource section on the gallery, at some point we might have something like that in place which would be good! Until then though the best thing to do is probably include them in a scenario and then upload it to the gallery. You can then request for your scenario to be part of the following group (http://www.greenfoot.org/collections/4) and people will hopefully find them there!
Wow! You are very fast! I'll do that. You'll see the scenario in a few moments...
I think the resources page would be a good idea. Is there any way I could help to make that happen? Are there any resources in particular you are waiting on having ready?