  We propose two approaches for extracting the total gluon helicity
contribution to proton spin from lattice QCD, one from local operator matrix
elements in a fixed gauge accessible on lattice with feasible renormalization,
and the other from gauge-invariant nonlocal gluon correlators. Neither of these
approaches requires a matching procedure when converted to the MS scheme. Our
proposal resolves a long-standing inconsistency in the literature regarding
lattice calculations of the total gluon helicity, and has the potential to
greatly facilitate these calculations.
