This is very much a long shot. but there is a marriage registered in the Irish civil registration index for a Michael Gloster in Birr registration district Apr - Jul 1943 volume 3 page 217 and there is a match for a Catherine Kenny. It could be a possibility but as there are 4 couples on this page it is by no means certain that this was a Gloster/Kenny marriage.
However if you think it is worthwhile to check it out you can download an application form at www.groireland.ie
. If you do decide to follow-up I suggest you ask for a photocopy of the entry as it costs less and gives the same information as a cert.