freezer does not turn off, -2 degrees on warmest setting, can this be reset?

Hi, well this isn't something that can be "Reset'. You see what has happened is that the Thermistor and or the Thermostat is most likely the problem, if so this will need to be replaced to effect repair.Also unfortunately it maybe the main controller board? There is simply no way to actually tell with just these symptoms and without actually examining the unit. To effect a repair as fast and as inexpensively as possible the very best thing you can do is to call in a professional, contact a local or head office from GE, ask them for a referral to an authorised service center, then make contact there and ask for a service call. Now when you are in face to face contact, at this time ONLY, ask for a "Quote" as to what's wrong and prospective costings, and proceed from there, once you know what's going on?
Really it isn't a DIY repair, however if you do wish to DIY, then you would need to obtain a service manual, use that and perform and work through the troubleshooting steps to locate and isolate the suspect parts and then using the service manual to get the parts numbers, and obtain the spares.