The 2a.2G and 2a.2GTM seem to correspond to special versions of plush surviving the transition from the 1990-1991 catalog.
Examples include cats with stitched toes, Flocked nosed dogs, each tag version corresponds to a light and dark single sided tongue, the sitting bear series featuring smiles, standing bears with a new style of leather nose, plush that did retire are produced with this tag just before retiring usually featuring a smile stitched mouth.