This document analyzes GPU usage for GA and CT flights at various Indonesian stations from July 1-15, 2011. It finds that CGK has the highest GPU usage of 23 units from 5-6am local time. DPS peaks at 5 GPU from 10-11pm locally. UPG needs 3 GPU from 10-11pm and 5-6am. SUB requires 6 GPU from 5-6am and includes Citilink flights. The analysis considers arrival, departure, and transit times to determine peak GPU demand periods and numbers needed at each station.