Even if the Philippine government will place some firewall or regionlocking, it's not very hard to access the gambling websites with proxies or via tor or something. And since you use bitcoin for payments, it doesn't matter where you live, easy to just gamble in secret.
Vpn might be helpfull for that but i dont think it will be more effective but it can be block if government will take some action regarding to it. Bitcoin are quite popular in philippines and i will not surprise if they will discover some illegal liabilities regarding on bitcoin and casino its because the government knows bitcoin as illegal money. And also our wallet provider wich is coins.ph have already counter measure and disallow gambling transaction on their wallet transfer thats why some other user's experience some locking of their wallet since some of them are known gamblers. Maybe it will be the basis for government to block all vpn gambler users.