You must have an HQL. Find a local FFL (I recommend one of the Industry Partners on this forum). The absolute easiest option is if he can drive it to MD and you guys meet at the FFL to begin the transfer process and 7-day wait. If that is not an option, he must ship it direct to the FFL via UPS or FedEx and follow their procedures. If your local receiving FFL does not accept transfers from a private individual, your father will need to have a local FFL ship it on his behalf. Expect to pay each FFL $25-$75 for their services. The MD FFL will likely be more expensive (unless your father lives in NY or CA).
The only exemption for the HQL is inheritance, not gifting.