Oh my God! This is happening to other people?! I thought my iMac (Retina 5K, 27-inch, Late 2015)'s GPU was failing! I had been running all sorts of diagnostics

Oh my God! This is happening to other people?! I thought my iMac (Retina 5K, 27-inch, Late 2015)'s GPU was failing! I had been running all sorts of diagnostics to figure out what needs to be replaced or if I only have a few more moments with my 5K iMac. It's been seriously making me mad since Apple has failed to update this product in their line.