It’s an NVIDIA specific term that is the abbreviation for GPU System Processor. It’s a RISC-V core that does all sorts of management tasks on a modern Nvidia card, mostly related to task setup, resource allocation, context switching, adjusting clock speeds, etc.
I use Microsoft SwiftKey for the same reasons, find it hard to switch or get used to anything else.
Having used SwiftKey since before Microsoft acquired them, I’m a little annoyed at all the shit they’ve tacked onto the keyboard (like no, I don’t need Bing and ChatGPT in my keyboard, thank you very much). But nothing else let’s me mix languages in the same way as SwiftKey.