If by “true peppermint” you mean mentha piperita, then yes.  It is in the 4″ Gilberties herb selection and the tag says “Mint White Peppermint”.  This was found at the Glenville Hewitt’s .  The stores get the same selection but some might have sold out sooner and not have gotten refilled yet.  It might be a good idea to call the Hewitt’s nearest you to check before you make the drive.  You can go here and click on the map for the store locations and phone #s.