I will recommend to read some reviews first (
https://www.trustpilot.com/review/gate.io) regarding gate.io before doing stuffs there as they require KYC. I see lots of negative reviews, scam accusations related to withdrawals and etc..
If those coins are not available anywhere but on Gate.io only, you don't have a choice either regardless of their status.
If and only ifs, then you should accept the risks of using their platform.