Takoa was always used as a qualification of gao:

Ab1-64	Ab2-57	Ab2-71
ko te manu gao takoa	o te manu gao takotakoa	e manu gao takoa
Ab3-39	Ab4-18	Ab8-56
o te tagata gao takoa - ki te maro	tagata gao takoa - no te henua	eaha te manu gao takoa

Eb5-29

e manu gao takoa

In other words, gao takoa seems to be the joy magically delivered by the high spring sun, the satisfied gao o te kohio (where kohi = 'bamboo').