Do not panic. It's week one; a million star players (Turner, Schaub, A. Johnson, even AD) didn't do squat.
If you dump Gore now, not only will you be getting rid of probably your best player, but you'll be doing so for less than market value due to a poor first showing. Hang on to him, and start him with the confidence you had when you used a high draft choice on him.
QB: Cutler, Freeman
WR: A. Johnson (Gaffney)
RB/WR/TE: Nicks (Boss)
RB/WR/TE: Tomlinson (Greene, Jennings, Davis)