  We present the results that form the basis for calculations of the
unpolarized gluon parton distributions (PDFs) using the pseudo-PDF approach. We
give the results for the most complicated box diagram both for gluon bilocal
operators with arbitrary indices, and for combinations of indices corresponding
to three matrix elements that are most convenient to extract the twist-2
invariant amplitude. We also present detailed results for the gluon-quark
transition diagram. The additional results for the box diagram and the
gluon-quark contribution may be used for extractions of the gluon PDF from
different matrix elements, with a possible cross-check of the results obtained
in this way.
