It is not likely the gilts you have will be suitable for breeding.When a breeder sells weaners , and the purchaser asks for specific purposes (in your case for eating) the selection of breeding quality is determined at that point. Bad teats, dummy teats , twisted leg……any number of faults may be carried by your pigs . That is the reason they would have been sold to go into the food chain.
You could always ask the breeder if such selection took place , and if not too far from you to look at the pigs with a critical eye as to their breeding quality. You must also remember the only person who can Pedigree register the gilts is the origonal owner/breeder and not yourself.
If you sell the gilts for breeding as they are at the moment they are pigs…..not Gloucestershire Old Spot Pedigree pigs.