What do you mean? Do you want a list of which parts are required, or do you want somebody to give you a list of parts for your gaming PC?
If the first, a gaming PC would require:
-CPU
-CPU cooler (or you can use the stock cooler included with the CPU)
-RAM
-Motherboard
-Case
-Graphics card
-Power supply
-Hard drive
-Optional: SSD
-Optional: Optical drive
-Optional: Extra fans
If the second, what's your budget, and what games do you want to play at what settings, what's your monitor resolution, what framerate would you like to average.