I have never touched Gauntlet or Corrupted Gauntlet before, but with Cuppa I've reached 320+ Gauntlet completions. 60% of them CG, without even knowing the mechanics.
I've spend about 100 hours on the bot and haven't worried at all. It never gets stuck, and can be run for 20 hours without issues.
It just kept completing those easy CG and taking breaks as configured.
As for loot, I've achieved 4/5 missing the enchanted seed, but gained about 50M profit from this on my Ironman.
10/10 would recommend, to everyone.
If you are botting with Runemate on Runelite, you can also try disabling ALL plugins, as many can interfere with the bot behavior in unknown ways (you can make a separate profile on Runelite with your current plugins saved, for using when not botting).
You can keep the GPU plugin on with default settings, and fps/worldhop plugins for checking if your FPS/ping are reasonably low. The bot can get kind of laggy depending on your PC since it's running a lot of calculations (especially in the hunllef fight), which I will continue to try to optimize.