I am going to answer your questions but it is my opinion that you are no where near ready for a venomous snake, and especially one the likes of a Gaboon.
1. Will i ever be able to hold it. (for people that wanna be a jacka$$ this would mean without it killing me)
Answer: If you mean with proper snake handleing tools then yes you will HAVE to interact with the snake to properly maintain it. Most Gaboons I have had needed to be soaked weekly to get proper hydration. They can also have medical needs from time to time that require interaction.
If you mean hold it as in your bare hands the answer is a no and even asking that question is what makes me believe you shouldn't even think about getting ANY venomous snake. There isn't a single venomous snake that should be free handled.
2. Is there a way to make it non venomous, or atleast less dangerous?
Answer: There are venomoid gabbys for sale from time to time. Personally I don't agree with the procedure but that point has been argured to death. One thing to remember is that Gabbons have LONG fangs, 2" . That would still hurt a ton if you get tagged.
3. Would i want to carry an anti venom in my house if it did bite me.
Answer: As an individual you would have a hard time getting it for a gaboon and if you could the cost would be astronomical.
Please, please do a lot more reasearch on venomous snakes in general. By your post it is obvious that you are not ready to take on the responsibility that is associate with one. Find someone near you that is qualified to show you how to properly maintain a snake first.
Owning a venomous snake at this point is a privilage more so then a right and there are tons of people wanting to take that privilage away. As a community we can't afford any negative attention created by someone's mistakes.
Jason