The font family as well as the Source Code Pro fonts support Irish but it only contains dotted cgms.

The dotted bdfpt should be added in the next update for Latin-8 support.

See the image, the top paragraph is set in Calibri which contains all the dotted consonants, the bottom paragraph is set in Source Sans Pro which has some dotted consonants.

Credits for the text goes to Ciarán Ó Duibhín.