You get used to it after a while, I actually started tracking when my teachers checked our screens and stuff, it's become relatively easy to get by unnoticed.
My school doesn't use GoGaurdian, but something similar called like Owl or something or other.
It allows them to redirect us to specific tabs or websites, close our tabs, open new tabs, watch our screens, lock out certain options, change the options, mute our laptops, and most annoyingly, blank our screens; as in cover them in blue or white.;
Not fun, but the application they use is only as smart or attentive as the teacher themselves, so it gets easy after a bit.