Unfortunately, not really. CSV is designed for tabular data, in other words it is designed for data formatted as columns and rows. JSON, the kind of data that GraphQL returns, is designed for hierarchical data, in other words it is designed for data formatted as a set of hierarchical, nested objects.
If you formatted your query very specifically, to only return flat rows, or if you post-processed the information you received to turn it from hierarchical data to tabular data, then you could convert it to CSV. But there's no simple way to take the result of any GraphQL query and convert it to CSV.
I hope that helps. Let us know if you have more questions.