Did we ever find out what happened to the Quagmires?

I don't think we do. Some people think they died, but I think they lived, and were doing other things with V.F.D. But, no, we never do actually find out what hapend to them. If you'd want to see what other people think happend you can find fanfiction websites and see tough. :)Hope this helps

My guess is that they survived in the Great Unknown.