Can Gum Grafts Be Performed on Teeth with Existing Restorations at the Gum Line / Existing Bonding on Root Surfaces?

As the question states - can gum grafts be performed on teeth that have restorations along the gum / root surfaces such as composite fillings / bonding? If the majority of teeth have some degree of gum recession, but also have bonding/composite fillings along the root surfaces, can gum grafts still be performed? If not, what are the options? It appears there is still a fair amount of healthy gum between the teeth, just loss of gum along the gum line on the face of the teeth, including some molars.