I have now a minimal working code, though are still many issues that need future work. Namely, the default title offset is not enough to not overlap the custom annotations and those, easily clutter near the prime meridian.
G, cl = worldrectangular("@earth_relief_30m_p", proj="vandg", latlim=(-70,85), coast=true);
grid = worldrectgrid(G);
grdimage(G, shade=true, plot=(data=cl,), cmap=:geo, B=:none, title="Van der Grinten")
plotgrid!(G, grid, figname="vandg.png", show=true)
