Hi Kirsten,
The marriage record on www.rootsireland.ie/ has more info than most records so you're lucky there:
Date of Marriage:12-Nov-1859
Parish / District:ARDS
County:Co. Down
Husband DavidMcGimpsey Address:Drumawhey Occupation:LABOURER
Age:21
21Status:Bachelor (Previously unmarried)
Wife: CatherineCopeland Drumawhey
Spinster (Previously unmarried)
Denomination:Civil Parish / District Civil Parish / District
Husband's Father :RobertMcGimpsey Occupation:BLACKSMITH
Wife's FatherName ThomasCopeland Address:
LABOURER
Witness 1 Name:JohnMettleton
Witness 2 SarahCopeland
Notes:
Church: NEWTOWNARDS REG OFF
BY LICENCE REV J WHITE.
Down records are not included in an Irish Census until 1851 but there are no McGimpseys. However there is a 60 year old David McGimpsey in the 1901 census (free at census.nationalarchives.ie/) & a 72 year old in the 1911 both in Newtownards. Wife is Catherine in 1901 but not there in 1911.
I couldn't find a death or burial record for him I'm afraid.
No McGimpseys in the Tithe Applotments but Griffiths Valuation (free at www.askaboutireland.ie/) has lots of McGimpseys in Down including 2 Roberts in Donaghadee & a David in Newtownards in 1863.
No luck with David or Robert's baptism records either.
Col