Although Gb1-6 does belong to the viri-group it is a special variant incorporating also other signs. It can be compared with Ga1-26, whích evidently represents its opposite not only in visual cues but also numerically:

Together Ga1-26 and Gb1-6 measure out not only 9 * 29 but also other numerical qualities. 235 is equal to 5 * (29 +18) possibly to indicate that half of the text pertains to the dark half of the year (29) and the other half to the light (180).

261 is not only 9 * 29 but also = 1 + 10 * 26, just as 471 = 1 + 10 * 47, where 47 = 29 + 18.

We can compare Ga1-26 with the 'gnomon' glyph in K and with the even more similar Kb5-301 (which glyphs do not, however, have viri 'feet'):

Ga1-26	Kb4-7	Kb5-301

The torso and legs are invisible, as if the 'person' has sunk very low beyond the horizon. Probably this is a visual representation of midwinter.

Gb1-6, on the other hand, is standing high, with 9 + 9 = 18 'feathers' (meaning 'fire', i.e. light and heat) at the top end. Probably Gb1-6 represents midsummer.

Side a covers the 1st half of the year and side b the 2nd half. That is the impression we get.