She has parvo and needs me to give her gatorade how much do I give at one time

If your dog has parvo you should see a vet. The dog is in need of an IV which puts fluids DIRECTLY into the blood stream.

You can also order parvaid. Its been proven to naturally heal parvo. -- HealthFitLabs (http://www.healthfitlabs.com/products/684534010010/parvaid/)

You can also treat with Colloidal Silver -- How to Treat Parvo and Save Your Puppy's Life - At Home | eHow.com (http://www.ehow.com/how_2261356_treat-save-puppys-life-home.html)

Gatoraid is nothing but sugar and salt.. your dog needs medicine... NOT gatoraid

You should try pedialyte, gater aid and power aid are really high in sugar which can lead to dehydration. They are good because they have the electrolites, so if it's the only thing avalible then give her small amounts frequently. Giver her 1-2 ml every 5-7 monutes. Don't let her gulp it down.
How big is your dog? Breed and weight? Have they been to the ve andf are they on any meds?

Whoa. Vet now. With parvo, even with veterinary care there's a greater chance of dying than surviving in many cases.