I never thought of Graal as pay to win. Supah is absolutely correct that in the end it comes down to how much pvp experience the player has. The guns only make a small difference and none of them are restricted to real life currency only.
When I think of p2w it would mean you would need to pay real life currency to buy a buff to boost your damage or your HP or to have some sort of advantage over a player who can only use gralats. I am glad graal has decided not to go down a path like that in pursuit of money and kept it fair for everyone