Girona remind me of Newcastle in the Champions League, I think they might try their best to advance to knockout stage but I won't think much about them since some of their players are out already and they might not be able to replicate such form but maybe they might be fortunate to do better than Newcastle
There are worse options than what happened to Newcastle - for example Union Berlin. They failed in the Champions League and miraculously remained in the Bundesliga, were very close to relegation. But I think that despite the fact that Girona lost several players, such a failure is not threatening them. I think they will be able to qualify for the 1/8 finals of the Champions League (in the new format it is much easier for newcomers) and then everything will depend on the draw.
It's not easy because the champions league itself isn't all that friendly especially to new teams and I say this cause of the experience I have seen from most teams like Leipzig, Newcastle, and some others and all have failed to make any positive growth and that's why I don't feel any positive achievement will be made to their champions league campaign, but although am not sure for their Laliga journey but the champions league am sure that they will be knocked out.