|You generally can NOT upgrade the cooling fan or heatsink in a laptop like you can in a desktop system because there's simply no room.|
The Gateway NV had 3 choices in AMD A-Series APUs: A6-3400M, A8-3500M, A8-3520M. I suspect those are the only APUs supported by the BIOS. I can't say with 100% certainty that an A10 will not work, but I know I wouldn't consider trying it without doing some major research & being reasonably sure it's supported.
BTW, your laptop would NOT catch fire. I assume you're dramatizing for effect?