Is GMX used in USA?

Could you please clarify for me if GMX, a cryptocurrency or financial platform, is actively being utilized in the United States? Are there any regulations or legal frameworks in place that specifically govern its use within the country? Are there any notable businesses or institutions within the US that are leveraging GMX for their financial transactions or investments? Additionally, are there any potential concerns or challenges that users in the US may face when it comes to adopting or utilizing GMX?