Definition of がな
がな
gana
particle
1.
particle used to indicate the speaker's hope, desire, wish, etc. (e.g. "it would be nice if ...", "I wish there were ...", etc.)(at sentence-end)
See also:もがな
2.
emphatic particle(colloquialism)(at sentence-end)
3.
particle adding uncertainty(often associated with an interrogative)
Other readings:
がなあ