I can't find anything online about it, as it's just so common to grow grapevines vertically.
I don't know if the vines I have are ornamental or fruit-bearing but I feel it's probably ornamental. I thought of planting some to just sprawl along he ground as a ground over in summer and mulch producer in winter.
Good idea? I'm also planting sweet potato as a ground cover but as it's a cold winter here at the moment I don't know if it'll develop roots.
Like Steve says, it is possible but not really practical for mulching or use as a ground cover since they will not grow thickly enough to shade out other plants.
Add to that the very close spacing you would have to use and you rapidly have no sparse root area to grow food plants.
I have an area that is wild grape vines and around 10 species of native grasses grow up through them every year.
One other thing about grape vines, they are natural climbers, when they reach anything vertical like a tree, shrub, fence, wall, they are going to climb up it (that is the function of the tendrils that grow opposite the leaves).