Hi,
I wanted to ask if you can put hardibreaker over sheetrock? in the shower

No, but why do you want to?

because it was all ready there and I just wanted to know if I could put the hardibreaker over it so I could put up the tile

the bathroom had a tub and shower in and the sheet rock was covered by the surround all that was behide it was just plan old sheet rock Not greenborad or anything that is waterproof

Hardibacker isn't waterproof either. For waterproofing, you need a membrane such as Kerdi, or a paint-on waterproofing such as Redgard.

You have pulled out the shower surround and are planning to tile up the walls from the tub, correct?

Yes and No I took everything out tub and all I want to build just a shower so I wanted to put up the hardibracker orver the sheetrock, I did get the redgard to seal it,

If the sheetrock in the shower area is in good shape you can add a bunch of screws, two coats of redgard and tile directly on that. No need to mess with hardi.

However, the framing and drywall in old bathrooms is seldom in good shape. It's best to rip everything out, check for mold and plumbing problems in the walls, then straighten and re-inforce the studs as needed. Then re-install drywall and kerdi or redgard over that.