I took the Krea2 BF16 Safetensors from https://huggingface.co/krea/Krea-2-Turbo/tree/main and made two GGUF's Q8_0 and Q4_0.

I tested both, and they worked with GGUF - I used this particular GGUF loader, but there are several out there for Krea, but this version I installed for Ideogram 4 GGUF and it just happens to work for Krea2 as well - https://github.com/molbal/ComfyUI-GGUF

I do also have Krea2 RAW GGUF, but trust me it doesn't really make images, I only have it in case I can use it for Trained.