Hi Christine
not sure I can help but I noticed your query and while researching another one I came across a birth in 1725 of a Grumley in St Peters Anglian or Protestant church in Drogheda County Louth see http://ireland.anglican.org/about/185 and Baptisms but I did not check any other of those records such as marriages or deaths.
I searched Griffiths Valuation done 1848 to 1864 and got no hits but many Grimley, mainly in Armagh, Antrim and Dublin. see http://www.askaboutireland.ie/griffith-valuation/index.xml?action=nameS… On a chance I searched the Tithe Applottments 1824 to 1838 and was amazed to see 19 Grumleys, mainly in what is now the Irish Republic or Ireland, Kings and Queens is now Laois and Offaly. (Armagh and Antrim are now in Northern Ireland and part of the UK).
The lady he married Rosa Hackett is interesting, a new bridge, the Rosie Hackett bridge was opened in Dublin last year, she was involved in the rebellion of 1916, born in Dublin but unusual enough name. See http://www.womensmuseumofireland.ie/articles/rosie-hackett--2
Catholic parish registers are here http://registers.nli.ie/ but you really need a date as they are not searchable if records even exist, by the way President Obama has an Offaly ancestor.
I searched a subscription site 1821 plus or minus 2 years and got 28 Grumley hits but no Philip, the hits were in Dublin, Wicklow and the midlands, Offaly, Laois, Carlow, Westmeath etc. I also searched Rosa Hackett and got two Rose but they were birth estimates from their deaths, plus one Rose Hackett who gave birth in 1833 so not your lady.
Irish records are not great post 1850 and are hit and miss for various reasons. Civil records started in 1864 for Catholics and are here http://www.irishgenealogy.ie/en/ a search for Grumley from 1864 to 1900 brought back a lot of them under civil records, only Dublin, Cork and Kerry are on Church records but again lots og Grumleys in Dublin plus 1 in Cork various years, no Philip, some hits are for sponsors in Dublin. http://www.irishgenealogy.ie/en/ for perceived legal reasons the site is a sign in site but free. So god I gave the link twice.
If you have any more queries let me know or any follow up.
Regards
Pat