Claim: Only 5% of Northern Ireland's GDP goes to Ireland.
Fact-check: Irish border: how much trade? - Full Fact
Verdict: roughly correct in terms of goods exports. but goods exports are not normally measured as a percentage of gdp. 33% of northern ireland's goods exports went to the republic in 2016.
Organisation: Full Fact
Author: Joël Reland
Date published: 2018-09-11T00:00:00