1. In Honeycam Settings(Hotkey: F5) > GIF, turn on the option below.
2. Just set the Quality to 100 before you save what you edited.
You can keep the quality of original images as long as just removing some frames or cropping some area out.
However, please keep in mind that the quantization might be done when you apply filter effects or photo frame effects, or resize. In other words, the quantization is inevitable when the number of colors of each image exceed 256 colors after some processes you did.
Especially, please keep in mind that resizing could add more colors even though it looks same on the screen.
The feature mentioned above is added to Honeycam v3.35, please update to the latest version if you're using the version less than v3.34.