Breen has some articles on gerbes, for example Differential geometry of gerbes, in which he treats gerbes as stacks.
See book by Breen
Totaro remark in the review of Breen's Motives article: The Tannakian category of motives over a finite field should correspond to a gerbe over Q, not a group, because there is no Weil cohomology theory for varieties over a finite field which takes values in Q-VS. One can describe an explicit gerbe over Q equivalent to this one under the assumption of the Tate conjecture.
http://nlab.mathforge.org/nlab/show/gerbe
nLab on gerbes in nonabelian cohomology
nLab page on Gerbe