tRNA (guanine-N2-)-methyltransferase activity

Catalysis of the reaction: S-adenosyl-L-methionine + tRNA containing guanine = S-adenosyl-L-homocysteine + tRNA containing N2-methylguanine.

N(2),N(2)-dimethylguanine tRNA methyltransferase activity, N2,N2-dimethylguanine tRNA methyltransferase activity, S-adenosyl-L-methionine:tRNA (guanine-2-N-)-methyltransferase activity, S-adenosyl-L-methionine:tRNA (guanine-N2-)-methyltransferase activity, guanine-N2-methylase activity, tRNA (guanine-N2-)-methyltransferase activity, tRNA 2,2-dimethylguanosine-26 methyltransferase activity, tRNA(guanine-26,N(2)-N(2)) methyltransferase activity, tRNA(guanine-26,N2-N2) methyltransferase activity, tRNA(m(2,2)G26)dimethyltransferase activity, transfer RNA guanine 2-methyltransferase activity, transfer ribonucleate guanine 2-methyltransferase activity, transfer ribonucleate guanine N2-methyltransferase activity