Can a Non-US citizen living here legally with work visa, or Green Card petition to change name and gender?

I know that legally in the US anyone can change their name and gender when transitioning from one gender to another. I a legally living and working here. Do I have to wait to become a US citizen to change name and gender? or can I do it now? I have legal status with work visa, my green card has been approved and will be comming shortly. I live in Florida.