what do you mean by "neutral"? Do you mean:
a) lack of movement, in which case you seek to profit from theta decay, or
b) significant movement, but in either direction, in which you would seek to profit from the increase in Gamma.
For the benefit of t he other ladies and gentlemen reading this, Theta and Gamma work in opposite directions. In (a) Theta is your friend and Gamma is your adversary. In (b) it is reversed.

