Exists a collection of chatGPT written sentences (in German)?

Hello,
I am a computer linguist working on German Grammar. I want to analyze the Grammar of the sentences written by chatGPT. I have a special parser at hand and I want to parse around one Million German sentences written by chatGPT. The sentences can be isolated, its solely about the grammar of single sentences.

Exists anywhere such a collection of chatGPT written sentences?