GLBy0.08 grid is 0.08 deg lon x 0.04 deg lat that covers 80 S to 90 N.
GLBv0.08 grid is 0.08 deg lon x 0.08 deg lat between 40S - 40 N. Poleward of 40 S / 40 N, the grid is 0.08 deg lon x 0.04 deg lat. It spans 80 S to 90 N.
GLBu0.08 grid is 0.08 deg lon x 0.08 deg lat that covers 80 S to 80 N.