Code for a Gateway ADC-320 needed

Hi chris_vau888
You could try these codes :- 1100, 1104, 1185, 1221. If none of those work you could try the philips code lookup finder at :- http://www.urc.philips.com/ You will need the remote model number, either from the front of the remote or in the battery compartment.

Hope this helps,
Mark.