Pour the Gatorade into a shallow, freezer-safe container.
Add a pinch of salt to the mixture and stir gently to combine evenly.
Place the container in the freezer. Every 30 minutes, take it out and stir vigorously with a spoon to break up ice crystals. Repeat this process 2-3 times until the mixture becomes thick and slushy.
Once the Gatorade has a icy, granular texture, pour the soda over the slushie base.
Gently fold the soda into the slushie with a spoon, mixing just until combined and bubbly.
Return the container to the freezer for another 10-15 minutes until fully frozen and scoopable.
Remove the container from the freezer and use a spoon to scoop the icy, vibrant slushie into glasses.
Enjoy immediately as a cool, chunky, and flavorful summer treat!