dotfiles/.config/waybar/modules/custom-gpu-usage.jsonc

{
  "custom/gpu-usage": {
    "exec": "cat /sys/class/hwmon/hwmon1/device/gpu_busy_percent",
    "on-click": "kitty --class center-float-large nvtop",
    "format": "GPU: {}%",
    "return-type": "",
    "interval": 2,
  },
}