I found this but have not installed or tried.
Laser optimized GUI for GRBL
LaserGRBL is a Windows GUI for GRBL. Unlike other GUI LaserGRBL it is specifically developed for use with laser cutter and engraver. LaserGRBL is compatible with Grbl v0.9 and Grbl v1.1
All downloads available at https://github.com/arkypita/LaserGRBL/releases
GCode file loading with engraving/cutting job preview (with alpha blending for grayscale engraving)
Image import (jpg, bmp…) and line by line GCode generation (horizontal, vertical, and diagonal).
Grbl Configuration Import/Export
Configuration, Alarm and Error codes decoding for Grbl v1.1 (with description tooltip)
Homing button, Feed Hold button, Resume button and Grbl Reset button
Job time preview and realtime projection
Jogging (for any Grbl version)
Feed overrides (for Grbl > v1.1) with easy-to-use interface
As claim to be laser optimized Z info are ignored when drawing preview!