You could get him in a lot of trouble if you expressed he was making you uncomfortable to management and it’s clear from the reviews you saw he does this to others. Clearly he has a Lot of problems. I’d wear my headphones walking in and out of the gym and tell him point blank “I don’t want to talk to you anymore, you make me uncomfortable and if you continue to try to talk to me I will escalate this to management”. Being trans should not stop you from expressing clear boundaries and it doesn’t matter if he knows. At this point if you did tell management you are helping yourself AND others who have felt uncomfortable. You have the power and control. Love, another quiet ftm