Gale Bertram is the GLORIOUS RAVEN riding FORCEFUL WINDS of destruction and mystery
GALE definition - a strong wind
BERTRAM definition - bright or glorious raven
Both of these definitions fit Red John perfectly. A strong wind carries conotations of forcefulness and mystery. Winds seem to come from nowhere, just like Red John. But also are majestic and awe inspiring similar to how many of Red John's followers perceive him upon first meeting him.
Ravens are commonly symbolized as dark, sinister, and veangeful creatures in culture. And the descriptive words "bright/glorious" just take it to a much higher level. This is who Red John is: a Great Dark Creature who swoops in from nohwere with forcefulness to perform his kills. Also the word gale (wind) fits perfectly with Bertram (raven).
I doubt Bruno Heller would have just randomly picked a name without thinking upon their definitions.
Gale Bertram is the one and only Red John of the list of seven
Stop thinking so logically about every single detail regarding Red John's identity and simply guess who he is based upon which actor would be the most likeable and suitable to "fill his shoes". What person of the seven would be the most entertaining to re-watch the whole Mentalist series over again with the knowledge that they are in fact Red John--only Bertram. He has the most appearances and air time on the show of all on the list. His leadership position in the CBI is a major "slap in the face" and showcases his intelligence and "guts" to be able to show himself face to face with this nemesis so often. And think of the glee and domineering pleasure he would derive from having Patrick Jane work for him.
