Clan members has different tags in their ranking like:
-GOW- recruit or -GOW- Bomber. it all depends on what game they play and what position they are selected into.
also some may have the -GOW- Leader (GTo) into it, it just means he/she is the leader of that group so everyone knows who his/her leader works for.
This goes for every division of the clan. everyone has his/her own rule.