I've come across the Fortinia brand on the 'bargain offer' shelves of the types of convenience stores/newsagents which frequently seem to be run by Asian families. They qualify as 'perfectly drinkable but nothing special, although surprisingly good for the small amount of money being asked for them'.
Try a Google search for 'Fortinia wine'. It brings up to a link to a Facebook page which I can't open because I'm not on Facebook. However the visible snippet reads "Special offer: Fortinia wine (Merlot & Pinot Grigio) now just £2.99!" and the heading refers to a convenience store!
As a basic table wine, to be drunk with a meal at your wedding, it will probably be perfectly acceptable for most guests but I'd suggest getting something rather better for the 'top table'.