Gb1-6 does belong to the viri-group (Ga1-26, Ga5-11 and Ga7-1):

261 we recognize from the ordinal number of the 'wormhole' glyph between Ea8-4 and Ea8-101.

145 + 261 = 406 = 14 * 29. Possibly the glyphs from Gb1-7 to Ga7-1 (notice the reversed ordinal numbers) describe 14 months.