I'm intrested in this broker but I didn't find its valid regulation. Could you help me please?

https://www.gcitrading.com/    

GCI is not a licensed or regulated broker even though it states offers that look good to be true. GCI claims to be operated and owned by GCI Financial LTD, an entity registered in Saint Vincent and the Grenadines Financial Services Authority (SVG FSA). We do find a match result to GCI in SVG FSA. Nevertheless, SVG FSA does not issue any licenses for forex trading or brokerage nor does it regulate, monitor, supervise or license international companies engaging in such activities. 

More importantly, two professional regulators the Spanish National Securities Market Commission (CNMV) and the French Autorité des Marchés Financiers (AMF) both issued warnings against GCI for providing financial services without authorization. You can check full warnings from CNMV and AMF.

The truth is, GCI is not overseen by any regulators. That means your personal data or your funds in this broker are unsafe and cannot be protected by any law. We would recommend traders stay away from unregulated brokers like GCI and trade with licensed brokers.