I think those games support GC, so feel free to get them. If you have any doubts, on the app menu on itunes, you can see the GC icon above the "buy app" button
Also, I don't know If I should put my GC tag since I feel strange giving my tag to anyone and not knowing him/her x)
mine is richxps but does anyone know how you can add all the names on page one at once ? Is there a way to copy and paste them all and send them at once ?