Up to this incident, I thought that maybe, just maybe, your uncle, by projecting his own macho fears onto you, was trying in a twisted way to "save" you from GRS. I thought that by sending you flowers and a get well card while you were recovering, he might just be starting to accept that you are a woman and might let up on his harassment.
Now, however, it is undisputibly clear that he is just a vindictive pig.
What your uncle said was so awful that I would suspect that he was trying to provoke you and your father into taking legal action, or cause trouble with your grandparents, over an incident that you might not be able to prove. Your uncle may have been thinking that as there is already a restraining order against your mother, it might look as though you and your father are troublemakers if action was taken against him too. I don't know anything about US law but in Britain there is the concept of "vexatious litigation", in which a history of taking repeated legal action can be held against a plaintiff. However, two such actions would not be enough to qualify. Besides, your uncle admitted, to your father, the vile things that he said to you.
I am so sorry that you have such a relative. Avoid him, avoid him, avoid him! Someone who is not ashamed to admit saying those things is capable of anything.