I can assure you that Gale Bertram is NOT Red John.When Jane reveals at the media the name, I realized it.Jane wouldn't give Red John so easy, especially after the reveal of the "Blake association". He would try to track him down and kill him instead.

Bertram tried to kill Jane.Red John would never do that except he was 100% sure that Jane identifies him and he CAN kill him.Remember that Red John tested Jane's reaction in the reveal of Timothy Carter's as Red John.He knows how is gonna happen and he wants to prevent it in his 'fight" with Jane.Moreover it would be the stupid finale that everyone is gonna HATE.
Finally, I want to point out that Bertram runs away because he knows the two possibilities:
1)Surrenders and is killed by Red John or an accomplice in the 'Blake association",
2)Runs away to protect himself.
The thing that puzzles me is why Oscar Cordero is so willing to help him escape and not just kill him as it was going to happen with Reede Smith.