This appears to be him, but I cannot be sure
1898 born
enlisted in RDF as 25464
There is no address with the MIC
1918 Feb 22 Gazetted 2nd Lt in RDF
1918 Sep 24 MC Gazetted
T. / 2nd Lt. Patrick John McGowan, R. Dub . For conspicuous gallantry and devotion to duty during an attack on a farm. On gaining his objective, he exploited his success 300 yards further, and personally killed an officer and two men and captured a machine gun which was enfilading the flank and preventing consolidation. When the enemy attempted to return to their positions, he held his fire until' they were close to his post, and then accounted for the whole party. Throughout he set an inspiring example to his men
did not serve in RIC, noted as 4.5 years in Army on Palestine Gendarmerie Roll
1922 Mar 30 enlisted in Palestine Gendarmerie as a constable
1923 arrived UK from Palestine. Gendarme. Unhelpfully gives his address as Strand Palace Hotel
1926 He is Secretary of Irish ex-Servicemen Factory in Dublin
1946 Oct 12 died dublin