Is GIMP 32 or 64 bit?

These links download the official GIMP installer for Windows (~200 MB). The installer contains both 32-bit and 64-bit versions of GIMP, and will automatically use the appropriate one.

Can I use GIMP without installing?

GIMP is an open-source image manipulation software used to create and edit images. The GIMP tool is also online available. We can use it without downloading it.

https://www.youtube.com/watch?v=0STnR7sefrM