It should be the same as the B anc C since the same transmission was used (except for the G's with the creeper gear - no idea how that was). Swinford's book says the G had a special modified B gearbox (this is the creeper gear transmission I mentioned) with speeds of 1.6, 2.25, 3.5, and 7.0 mph forward, but I seem to remember some folks saying some G's had the standard B gearbox. The standard B shift pattern is:
left forward - 2nd
left rear - 3rd
right forward - 1st
right rear - reverse
The pattern should be cast in the top of the transmission - it is for B, C and CA tractors. Hope that helps.