I don't think he's just a troll. I think he's a Narcissistic Sociopath.
He's been doing this for over 3 years and actively trolling any active casino thread in gambling forum, looking for people he can convince to send him money. He might actually think he's capable of helping them and doing all the things he promises. I also think he get's genuinely angry every time someone calls him out. Yesterday he left neg trust to 81 people. Imagine what a pain in the ass that must have been unless driven by rage.
Wow. That's a lot. This outpaces even a very dedicated troll.
Signs and symptoms of narcissistic personality disorder
I'd say: check, check, check, check and check.
What I find most annoying is the fact that there is no way to start a meaningful discussion which could potentially lead to the solution of a problem. Usually, when there's a problem in this forum, people chime in, both sides of the story are presented and if things work out well, a solution is found*.
In this case, people try, and instead of just answering simple questions, GP keeps on harping on irrelevant details, such as certain dates in question (July? September?), made up accusations ("defamation campaign" lol), or his definitions of things (what is a contract? etc.), trying to come across like a smart ass while not contributing anything toward finding a solution. Like those annoying kids back in school which thought they knew everything better, while everybody in the room knew they don't.
* I know that this certainly isn't always how it works, but it should serve as a good guideline for adults on how to solve a problem. Especially if the one accused has a "business" involved in the matter. Admitting being at fault here and giving back those 210 would have saved him a ton of time and maybe even got him some reputation for doing the right thing. The question is, though, if he can even influence his own behavior if it's an actual personality disorder.