  We present the first inclusive jet longitudinal double spin asymmetry A_LL
and differential cross-section measurement from STAR. This analysis reflects ~1
pb^-1 of polarized pp data taken at sqrt{s}=200 GeV with beam polarizations of
30-45% in years 2003 and 2004. Agreement between the measured differential
cross-section and next-to-leading order (NLO) calculations validate the
interpretation of the asymmetry results within the framework of perturbative
Quantum Chromodynamics (pQCD). A_LL is compared to NLO pQCD calculations, which
incorporate several possible gluon helicity distributions, and is shown to
disfavor the maximum gluon scenario.
