How do you say thank god in Gaelic?

Answer 1

For the record, "Gaelic" is used for the Scottish variety, and the Irish is called "Irish" at least in Ireland.

That having been said:

Mo dheartháir is the Irish and

mo bhràthair is the Gaelic (Scotland).

Answer 2

Go raibh maith agat, a dheartháir is Irish Gaelic. Scottish Gaelic would be Tapadh leat, a bhràthair. (verify this one)

Answer 3

Scottish Gaelic:

taing dhan t-sealbh!

taing a Dhia!

Irish Gaelic:

Buíochas le Dia