Although you can use your giffgaff sim in The Phillipimes @rays8142 you will have to use Airtime Credit as Goodybags only work in the U.K. and (for periods of time) in the E.U. / EEA.
As it will be quite expensive you may need to top up quite regularly.
Note: if you use Auto Top Up this will only work for a maximum of 3 times in any given month so depending on what amount you set as your default Top Up - up to a maximum of £30 - you may need to make top ups manually.
There are no contracts with giffgaff so if you mean that your goodybag renews automatically each month and so you wish to cancel it then this is something you must do yourself.
Go here and make sure that Recurring Goodybag is set to OFF
Hope that covers all eventualities!