| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Code |
Notes |
| G. | From Guantanamo (supplementary to routine convoys).(B.R.L.O. Cristobal 1155/2/1/43). |
| G.A.T. | Guantanamo - Aruba-Trinidad, (GAT.1 see N.O.I.C. Trinidad 1212Q/21/8/42) supersedes WAT). |
| G.B. | North Coast of New Guinea - Milne Bay. |
| G.C. | Gibraltar - Casablanca. North African Convoy. (see D.T.D. 1211A/42/1/43 to N.C.X.F.) |
| G.D. | Converse of D.G. = Merauke (Dutch New Guinea) - Thursday Is. |
| G.E. | Guinea - East (cancelled) |
| G.F. | Adelaide - Fremantle. (Admty. 2002A/12/1/42 to A.C.N.B.) |
| G.I. | New Guinea - Philippines. |
| G.J. | Guantanamo - Kingston, Jamaica. |
| G.K. | Guantanamo - Key West (B.R.O. Key West 1934Z/9/9/42) |
| G.M. | Gibraltar to Malta.(C-A.F.O. 1115/42). |
| G.M. | Galveston - Pilot Town Mississipi. (B.R.O. Galveston 1829Z/9/9142) (G.M.1 sailed 30.7.42).G.N. Guantanamo - New York |
| G.P. | Guantanamo - Panama. (Cominch 1851Z/6/7/42). |
| G.S. | Greenland - Sydney (C.B.)G.S, Gibraltar southward. (G.S.1 see W.D, 4.2.43 p.142) |
| G.S. | Grimsby - Southend (cancelled) |
| G.T.X. | Gibraltar intermediate eastward through Mediterranean. G.T.X. 1 to sail 24 May. (C in C, Med. 151754A May 1943) |
| G.U. | Alexandria - North Africa - U.S.A. Mediterranean - U.S.A. (amended C.A.F.0. 2645) |
| G.U.F | See U.G.F |
| G.U.F.(Z) | Slow ships for G.U.S. (C. in C. Levant 081126, August 1943) |
| G.U.S | See U.G.S. |
| G.W. | Guinea - West (Cancelled) |
| G.Z. | Guantanamo - Canal Zone. (G.Z.1 arrived Cristobal, Colon 3/9/1942) |
| Green | Eastgoing convoys, Mediterranean, Gibraltar - Port Said.(1939) |
| Greyback | Dieppe-Newhaven convoys of shuttle service. |
Data obtained from The National Archives kindly provided by Roger Hollywood.