Park’s 1817 census of Ballymoney doesn’t list any Gilmore farms in Drunkendult. The only Gilmour/Gilmore family in that census was in Dunaghy. (William & Isabella plus 6 children.) No Mathew Gilmour mentioned at all. The 1825 tithe applotment records for Ballymoney parish don’t list any Gilmore farms in Drunkendelt then, suggesting the family acquired their farms after that year.
http://www.irishgenealogyhub.com/antrim/tithe-applotments/ballymoney-parish.php#.XEGfABSqCns
The 1858 marriage in Aghadowey Presbyterian church gives Robert’s townland as Kidstown. So he evidently acquired the Drunkendult farm after that. (And it could suggest the early family graveyard might be in Aghadowey parish).
Griffiths Valuation shows Robert Gilmore on plot 3a in Drunkendult East in 1861. That was a 52 acre farm. There’s no Mathew in Griffiths in either Aghadowey parish or Ballymoney, mentioned suggesting he had died before 1861.
Noted this probate abstract on the PRONI wills site (full file is in PRONI):
Gilmore Matthew Brown of Drunkendult Ballymoney county Antrim farmer died 19 February 1940 Administration Belfast 8 March to Robert McIlroy Gilmore investigating officer ministry of labour. Effects £1250.
Here’s transcriptions of 12 Gilmore gravestones in Knock Rd:
Gilmore / in loving memory of / Robert (Bertie) / a dear husband father and grandfather / died 15th September 1995 / Sadie / a dear wife mother grandmother / and great grandmother / died 7th February 2010 / loved and remembered
Gilmore / in loving memory of / John Rankin Houston / 1916 – 2004 / and his dear wife / Annie Florence (nee Owens) / 1921 – 2004 / beloved parents and grandparents
In / loving memory of / Gilmour
Gilmour / Thomas Samuel / Enagh Farm / died 27th October 1980 aged 84 years
Gilmour / Ballaghmore
Gilmore / in fond remembrance of / a loving husband and devoted father / Samuel Burnside Boyd / died 22nd January 1967 / aged 49 years / till we meet again
Gilmore / in loving memory of / our dear father / Robert Gilmore / Roughan, Newbuildings / who departed this life 27th July 1952 / God is love
In loving memory / of / Robert Gilmore / who died 4th Augst 1907 / aged 46 years / and his wife / Isabella / who died 9th October 1932 / blessed are the dead who die in the Lord
Gilmore / in loving memory of / Nancy Jane / a much loved wife / mother and grandmother / died 20th June 1992 / aged 68 years / also James John / a much loved husband / father and grandfather / died 19th January 1994 / aged ? Years / Worthy of remembrance
Gilmore / in loving memory of / Mervyn / 1935 – 1995
Gilmore / precious memories of / Raymond / a dearly loved and devoted husband / called home 27th September 1995 / aged 51 years / as for God His way is perfect / Psalm 18 v 30
Gilmore / precious memories of / a loving daughter / Margaret / died 29th September 2008 / at rest