Alcohol of any description can increase uric acid, and so increase chance of gout although limited intake of wine is less likely to increase gout compared to spirits and beer.
I would suggest a minimal intake of wine if you cannot avoid alcohol completely.
There is no interaction with allopurinol and alcohol however alcohol can trigger another episode of gout. I would recommend white wine spritzers for your reunion night as that will allow you to have a good time while minimising alcohol content.
Do make sure that you also continue to drink plenty of water.