I am new to wireless, but it sounds like your wireless is working and it is just
a matter of setting it up to work with Gnome. Left click and choose Create New
Wireless Network. If you have an open
network in your area you can choose Connect to Other Wireless Network.
If it is encrypted, then you will need to know they type of security and the
key.
If you choose Manual configuration, then you need to choose Unlock.This
will allow you to turn off roaming mode if you use only one network and
want to be connected to only one network.

I am just blundering along but mine works as I have outlined.