  Given a weighted flag variety $w\Sigma(\mu,u)$ corresponding to chosen fixed
parameters $\mu$ and $u$, we present an algorithm to compute lists of all
possible projectively Gorenstein $n$-folds, having canonical weight $k$ and
isolated orbifold points, appearing as weighted complete intersections in
$w\Sigma(\mu,u) $ or some projective cone(s) over $w\Sigma(\mu,u)$. We apply
our algorithm to compute lists of interesting classes of polarized 3-folds with
isolated orbifold points in the codimension 8 weighted $G_2$ variety. We also
show the existence of some families of log-terminal $\mathbb Q$-Fano 3-folds in
codimension 8 by explicitly constructing them as quasilinear sections of a
weighted $G_2$-variety.
