Is it possible to install two GfCI Breakers on 3 Wire circuit with a shared neutral. I need to protect the normal receptacles downstream from the GFCI breakers

A GFCI breaker protects everything on that circuit. Do you mean GFI outlets?
GFI outlets can be wired to protect themselves only or themselves and everything down stream.

is it possible to install two GfCI Breakers on 3 Wire circuit with a shared neutral.Absolutely NOT.

You must use a two-pole GFI breaker for this.

Stanforty, couldn't they use a 2 pole breaker and where the 2 circuits split, use GFI Recepticles at the start of each circuit, and each have their own neutral from there.

Oh definitely.
I just answered the question as it was asked. There are several other options.