I would not send my kid to gymnastics in this circumstance, no. The best we can do right now is act on whatever information we have in any given moment, and in this instance, you have evidence of contact (your daughter and all her teammates and coaches) with an illness that could be coronavirus...
We may be in a similar position in a few weeks. I know my daughter's gym will do the best they can to keep things safe. Still, I cannot justify sending my kid to practice, particularly as more and more data unfolds about potential implications for children. But I'm so, so sad for my daughter...