After several days of work together with RetroMateo, and many trial/error tests, until I have finally been able to make all the boot animations that I had prepared for a long time work correctly, and more that will come now that I have managed to optimize and synchronize them the image and sound correctly, (problem that has taken me several days to solve).
You already have them available to download from the new section of the web Boot Animations for GarlicOS, and they are compatible with the Boot Animation Switcher APP that you have available in the Apps for GarlicOS section.
Here some examples: