Info about Conduction Sticker

Hi :]
Good Day!

pwede po bang magtanong kung may idea kayo about sa letters and numbers sa conduction stickers? meron po bang ibig-sabihin ang mga yun. Example: GA1234, GB4567. May meaning po ba yung letters kung bakit may GA and GB?
Sana po may makasagot. Curious lang po ako.

Thanks :]

Mukhang lahat kami nahirapang makasagot sa tanong mo Bro.

Anyway my wild guess is, they are not acronyms but simply letters distributed across the country just like the plate #s to establish reference and control pending the real plate #'s issuance. They are temporary and are easier to implement. 'Just my wild guess Cabalen. Cheers!