It appears that in the late 80's a massive conscription effort went out in Romania, which inturn made the Cugir factory begin to produce AKMs at a very fast pace. The ones marked "G" could have been for these new conscripts (IE Guard or the equivelant in Romanian).
"The Armed Forces are manned and equipped on the basis of the Law on National Defense of the Socialist Republic of Romania (SSR). Military service is mandatory for all citizens of the SSR. The term of active military duty is one year and four months for all branches of troops, two years for the Navy and on ships of the border troops. The draft age is 18 years for citizens with a secondary education and 20 years for others. The maximum age for draftees is 26 years. Men between the ages of 20 and 50 years and women between 18 and 45 can be enlisted for military services ... Reservists continue their training at periodic assemblies. These last up three months as necessary for individuals up to the age of 45 years, and one three month assembly is held for those between the ages of 46 and 50."
Further on: "A great deal of attention is devoted to theoretical training and field exercises for the fightingmen, to rifle, drill and other training, field firing and missile lauchings. The troops learn how to operate in any situation, including one approaching actual combat as nearly as possible, and make intensive use of the time to improve the quality of their combat and political training.
"In the training of commanders and staffs an important place is assigned to making the use of personnel and equipment in a rapidly changing combat situation even more effective, efficient and skillful. In the classes and exercises a great deal of attention is given to the physical fitness of the sub-units (squads 'n platoons) and units (companies 'n batteries) and to their capacity for rapid and maneuverable actions, surprise and the seizure of initiative in a battle. The fightingmen learn how to execute missions rapidly and decisively, to withstand hardships courageously, to perform in the manner essential in warfare and to master two or several related specialties.
"The competion for the title of "Advanced Fightingman" and "Advanced Sub-unit" has taken on broad scope in the forces. Olympiads of specialists, ten-day and week-long records events, competitions for the "Accurate Firing Cup" and so forth are conducted w/ the active participation of Young communist League organizations. The servicemen compete for the "Outstanding Servicemen" and "Advanced Participant in Patriotic Labor" badges."
IBTTRH
Ben