Laws regarding the possession and use of fake IDs or licenses vary state. If the penalty you receive in Pennsylvania for this offense is your real New York license being suspended or revoked this information will be reported to the NYS DMV.
In New York it can be a felony to possess a fraudulent or fake driver's license. You will have to contact your local DMV to find out what penalties New York will put upon your for the offense in Pennsylvania, if you do not receive a notice from them first. If the penalty is revoking your driver's license than it will not be valid in New York, the state that issued it, and thus you would be without a valid license period.
Having a fake ID is a serious offense in most states. In New Jersey it is a criminal offense rather than a traffic violation. Offenders can face jail time and have their driver's license suspended for up to 2 years. In Maryland the fine alone is $1500 plus the loss of driving privileges for up to a year. Laws are changing rapidly, our Insurance Headlines section can help you keep up.