You all know this one -

Go n-éirí an bóthar leat
Go raibh cóir na gaoithe i gcónaí leat
Go dtaitní an ghrian go bog bláth ar d'éadan
Go dtite an bhaisteach go bog mín ar do ghoirt
Agus go gcasfar le chéile sinn arís
Go gcoinní Dia i mbos A láimhe thú.

The question I have is this - there are two examples here where you have an adverb followed by what appears to be a second adjective, does the fact that you have - go - in front of the first word imply that the word that follows it is also an adverb or is it still an adjective?

ie: - go bog bláth - and - go bog mín - I'm trying to translate this as accurately as I can, so am I right in assuming that - mín - here means evenly (describing how the rain should fall) rather than even (describing the rain itself)? In French, I thought of saying - partout/everywhere - implying that the rain was evenly distributed everywhere (ar do ghoirt), but I've had another idea, that - mín - would be better translated as finely/finement. In French soft rain is often called - la pluie fine.

Yes, both are adverbs. The adverbial particle "go" occurs only once.

go bog bláith = go bog + go bláith,
go bog mín = go bog + go mín,
= softly and smoothly

Go raibh maith agat, a chara