IS THERE ANY USB CHARGER FOR MY LAPTOP? THE PLUG IN THE BACK OF THE LAPTOP IS LOOSE, IT WONT DEPENDANT(GATEWAY)?

You essential tariff you laptop via it's power port. It's the only circuit that feeds both the power control and the battery charger.

Thieve your computer into a good repair shop and see provided they can reconnect or replace the power port. If it is totally destroyed, you will need to replace the motherboard.