Not our problem. Something for the EU & Ireland to sort out.
To be blunt saying the UK can't set its own trade and immigration polices because some terrorists in South Armagh wouldn't like it and would plant some bombs isn't acceptable. It's pandering to the threat of violence. No nation can operate on that basis.
How lame is that answer?
First you said that it would need a bilateral agreement between UK and Ireland.
for BILATERAL agreement, both parties needs to agree, and Ireland can't agree, so no. Is not Ireland and EU problem, is UK problem as well, because remember is BILATERAL. So that will never happen
And the GFA is an international treaty that the UK, Ireland through the EU signed and is the unilateral decision of the UK that can break this deal as is the UK, not the EU that wants to eliminate the 4 freedoms.
The EU is more than happy to respect the GFA and give the 4 freedoms (freedom of movement included) to the UK, is the UK that doesn't want FoM (and the other 3 that goes with the pack) and that alone means violating the GFA.
So no, is not the EU and Ireland to figure it out as is the UK that is breaking the GFA
Of course, you don't give a feck, but YOU not giving a feck, doesn't mean that others from the same country as you can give a feck, the same country that is betraying them and breaking such a deal
And without the menace of terrorism, still breaking a deal that most of the NI population that hey! news to you! they are not terrorist, they don't want to happen
To not speak that ending unilaterally a international treaty would make to the UK international prestige and their future treaties and FTA that you pretend to strike alone