The largest gates at Memphis are called "Type C". At a minimum they are 272.5 ft x 241 ft. There are 11 gates designed for the B777:
459-462 - must enter/exit via TW V west of TW S, TW S south of TW V and TW B south of TW V. (No clearance east of TW B on TW V)
380-383
391, 393, 335
Note: 463 is not a 777 gate.
H005 (in front of Hanger 12) can also be used for contingency parking with the following restrictions: Aircraft must be towed from the east with at least 2 wing walkers, No on-load, off-load operations.
390 is the plane wash