In a formal context people use the following greeting:

Bonnleibheal_1/Aonad_1/EU1_01.mp3 Dia duit (literally, God to you).

In reply, people say:

Bonnleibheal_1/Aonad_1/EU1_02.mp3 Dia is Muire duit (literally, God and Mary to you).

This is how you greet more than one person:

Bonnleibheal_1/Aonad_1/EU1_03.mp3 Dia daoibh.