Below: USMC gate as seen from Wally's Filling Station
Keep in mind that the huts in Gomer Pyle, USMC are across the road from Wally's.

Below: Luke McCoy at the same spot

Here is a shot from The Andy Griffith Show,

a shot from McCoys with the same building in the background,

and a shot from USMC with the building now disguised as a diner.
Note in the USMC shot the pumps are gone but the island has been made into a planter.

Plus one more shot from McCoys with the gas pumps in
an entirely different location.