a1	30	30	b1	26	26
a2	29	59	b2	35	61
a3	24	83	b3	30	91
a4	27	110	b4	33	124
a5	30	140	b5	29	153
a6	29	169	b6	28	181
a7	34	203	b7	31	212
a8	26	229	b8	30	242
sum	229		sum	242

Probably the number of glyphs in a line is a sign to be interpreted. Line a8 has 26 glyphs and also line b1. No other line has 26 glyphs. It could be a sign to make the reader understand he should continue reading line b1 after having come to the end of the front side at the top of side a.

Line a8 has its glyphs upside down, but not line b1. Therefore all lines encountered while reading will alternate in orientation. Pairwise they can be perceived as 'front side' + 'back side', with the odd numbered lines representing the front sides and the even numbered lines representing the back sides. But the alternating pattern of orientation of the lines can, presumably, have no important meaning in the text of G, its structure is too complex. Possibly the pattern has been kept from tradition because it makes it easier to discern the number of the line on a side.

30 glyphs in line a1 connects it with line b8 which also has 30 glyphs, and the 16 lines on the tablet apparently form an uninterrupted cycle. Yet there are 2 more lines (a5 and b3) with 30 glyphs which should make us cautious and continue to reflect.

The first and last lines on side a together with the first and last lines on side b carry 30 + 26 + 26 + 30 = 112 glyphs, perhaps to be understood as 4 * 28 days or 16 weeks.

16 lunar synodic months - 16 weeks = 360 days. Maybe the reader should put two and two together and draw the conclusion that he should read 1 glyph as equal to 1 day, and that among 229 + 242 = 471 glyphs there must be 1 glyph to be read twice (in order to reach 16 * 29.5 = 472 days). Which one should it be? Presumably it cannot be any of the glyphs in those lines which sum up to 300 (the cycle of Sun according to what I prefer to call 'the old system'):

a2 (1)	29	29	b2 (7)	35	208
a3 (2)	24	53	b3 (8)	30	238
a4 (3)	27	80	b4 (9)	33	271
a5 (4)	30	110	b5 (10)	29	300
a6 (5)	29	139	b6 (11)	28	328
a7 (6)	34	173	b7 (12)	31	359
sum	173		sum	359

We can then try to subtract also the number of glyphs in line a5 and b3 (which each carries 30 glyphs). This results in a more convincing description of the Sun year according to the old system:

a2 (1)	29	29	b2 (6)	35	178
a3 (2)	24	53	b4 (7)	33	211
a4 (3)	27	80	b5 (8)	29	240
a6 (4)	29	109	b6 (9)	28	268
a7 (5)	34	143	b7 (10)	31	299
sum	143		sum	299

240 / 2 = 120 and according to this way of counting (i.e. from Ga2-1) tamaiti in Ga7-11 will be the last day in the 1st half of 240 days:

Ga7-1	Ga7-2	Ga7-3	Ga7-4
Ga7-5	Ga7-6	Ga7-7 (177)	Ga7-8

Ga7-9	Ga7-10	Ga7-11 (181)	Ga7-12
Ga7-13	Ga7-14 (184)	Ga7-15	Ga7-16

Ga7-17	Ga7-18	Ga7-19	Ga7-20
Ga7-21	Ga7-22	Ga7-23	Ga7-24

181 (counted from Gb8-30) becomes 120 if we subtract Gb8-30 and the glyphs in line a1 and line a5. A tamaiti glyph ought to stand at the beginning of a season, not at is end. Therefore the addition of Gb8-30 ought to have a corresponding addition in form of the Jupiter Rei in Ga1-30:

This operation turns 143 into a beautiful 144 (= 12 * 12) and 299 into 300, which evidently should be the end of the year according to the old system:

In Gb7-26 a 'cap' sign (the upper part of koti) inside the rising fish generates a kind of 'fruit' and Saturn rules this week:

Gb7-25 (436)	Gb7-26	Gb7-27	Gb7-28
144 + 150 = 294	295 = 10 * 29.5	296	297
Gb7-29	Gb7-30	Gb7-31
298	299	300

My redmarked 150 at Saturn in Gb7-25 (where 72 * 5 = 360 and where 4 * 36 = 144) could indicate the approaching end of the 2nd half of the Sun cycle according to the old system. New fire is ignited by way of Saturn's outstretched 'foot' at right in Gb7-31. The right foot is the last part of tagata.

The complicated Gb7-22 (where we can interpret 7-22 as a hint of 22 / 7 = 3.14) is a day of Mercury and it will be day number 291 according to the old system. The following Jupiter glyph is similar to Ga7-14 but now 'waving goodbye':