How To Transfer Gamerscore From One Account To Another Account On Xbox?

Hi, just so you know, I have around 2300 Gamerscore on my first account (which does not have Xbox Live). When I got Xbox Live, I had to create a new one for some reason, now I have two accounts one with 2300G and one with 400G, how do I transfer the 2300G from my non-Xbox Live account to my new Xbox Live account with the 400G? Thanks

Tagged as: Account, another, from, Gamerscore, transfer, XBOX