Ive been researching GJ CLUB a little bit at a time for a while
Ive found the world union champion is named Billy and he once visited the gj club to play an in person game against shion
In the anime mao mentions two previous presidents
I also looked at obscure japanese websites selling the light novels to find what year jin and kenta and komori and hotaru are in and i was able to figure out what year each character started and finished high school
The years are assuming kyoro was a first year in 2010 when the light novel began
I also believe kyoko will become president when kyoro graduates and kasumi will become president when kyoko graduates
Its also only mentioned in episode 12 that shion is the vice president
I actually didnt watch episode 12 until recently because i didnt have it in me to complete the greatest anime of all time
In episode 12 shion gives kyoro the nickname knight of common sense
2006-09: - First President
2007-10: - Second President
2008-11: -
2009-12: - Mao, Shion, Kirara
2010-13: - Kyoro, Megumi
2011-14: - Tamaki
2012-15: - Kyoko
2013-16: -
2014-17: - Kasumi, Seira, Jill
2015-18: - Jin, Kenta, Komori
2016-19: - Hotaru