Hi Craig
I do not have many resources on Galatians but what I have points to the Greek word ‘anathema’ which refers to something that is dedicated to God for either a blessing or a curse. John Stott in his ‘The Message of Galatians’ (p24) reckons this word was used in the LXX (the Greek OT) for the divine ban as seen in, for example, the story of Achan. In this story the spoil of the Canaanites was under God’s ban - meaning it was devoted to destruction. I would need to do further research to verify this but Stott was an exceptional scholar.
Now the reason Paul uses the word in Galatians 1:8-9 is fairly clear to me. In 1:6-7 he is clearly perturbed that his readers where in the process of abandoning the Gospel for a perversion of the true Gospel. Paul’s point is simply this, the false Gospel does not lead you to salvation but to destruction/curse simply because it is false. It cannot lead you to salvation. Ergo anyone preaching such a Gospel is, ipso facto, still under God’s judgment.
I do not think this necessarily is a barrier to a belief in universalism since I have not yet a firm enough grasp on whether this divine ban explicitly involves an eternal aspect to it. I will have to do more reading on the OT contexts and the use of ‘anathema’ in the NT (see Luk 21:5, Act 23:14, Rom 9:3, 1Co 12:3; 16:22 for instances of its use) As I read Robin Parry and Thomas Talbot I find that they have a clear place for God’s judgment/punishment as God’s way of bringing all to salvation since He purifies all sinner after the final judgment so they all will eventually choose salvation.
I have given all I have for the moment but it should point you in the right direction for places you can research for yourself. I hope it helps.