Combine the Jello powder and gelatin in a medium saucepan or heat-safe bowl. Pour boiling water and stir until the gelatin has dissolved. Once dissolved, mix in the cold water, then the Vodka.
Repeat these steps for the other two Jello flavors.
Place the ghost mold on a flat plate for easier handling. Using a measuring spoon, pour the Jello into the mold, alternating flavors for each row. Refrigerate the Jello shot ghosts for 8 hours or overnight.
Once set and firm, spray the bottoms of the ghosts with cooking spray to help with removal and prevent sticking. Run warm water over the bottom of the mold for 15-20 seconds, then gently turn the mold inside out to release the ghosts.
In a small bowl, mix a tiny amount of vodka with edible gold to create a paint-like consistency. Use a small paintbrush to apply the gold dust to the ghosts' faces. For extra shine, optionally spray with edible gold spray for extra shine.
Let dry for 1-2 minutes, then store the ghosts in an airtight container in the refrigerator until ready to serve.