Firstly, what do you mean by blocked the funds if I may ask, do you mean your USDT was not deposited into your spot account/wallet. Secondly, did you confirmed if gate exchange do charge for deposit fee and how much USDT did you deposit, I'm asking this because some exchange has deposit fee policy.

If you confirmed all these I ask you then you should know the reasons why you couldn't see your deposited funds before contacting the support.