answer:No, they aren’t. Depending on the age of the laptop, then can draw 19 volts, 27 volts, ore (on some older ones) 42 volts. And the amperage (the rate of flow of the electricity) required is also different from machine to machine. You are better off going to the Gateway web site and seeing that was shipped with your machine – it will give you the voltage and amperage in the specs. And it will probably give you a part number as well for the charger (as its own unit). Also, consider other vendors. Amazon is nice, but newegg.com is also reputable. As is tigerdirect.