hey sasush,
I think it really depends on two factors:
1) How high your gallery has been listed
2) How you talk with your visitor. I try to think about the visitor as a VISITOR, not as traffic. They will hardly click on a banner or buy some service if you don't talk to them.
If you get lucky, I think you can get like 1000-1500 clicks... it's hard to count because usually i get traffic from many others TGPs at once... I hope I helped you though
Take care,
Bruno