I have a DWL-122 (not G)- it's a tricky thing to get working, because it uses prism2 based wireless. Linux is normally fine with it except for the Prism chipsets on USB, which requires black magic to get working.

Works kinda fine on my old Pavilion though. My Presario didn't like it because the controller is 1.0, and the thing in 1.1 or 2.0.