Managed by Dom Jaehnke, former 265 and 265+ champ.
He is #3 in total total FON awards, #4 in total Super fights, #1 in total KO wins, #1 in total fights and 3rd best ranked among GAMMA fighters, i could stop right there, but i decided to elaborate a bit more.
He started fighting in GAMMA on 2014-08-30 and remained with the org for over 4 years! During that period he achieved a maximum rank of #7 worldwide and never dropped outside the top 1000. He continued fighting up till the age of 44y, which by itself is one of the longest (i do not have the exact stats, but there were only 3-4 HOF ranked fighters who fought into their 40s).
He surpassed Raz Matazz by just one fight to become the all time in total fights (this includes external and internal fights). With a total of 309 points, he is also the highest scoring 265/265+ ranked fighter of all time. His wins basically include everyone who matters such as Itse Perkele, Mitzi Glozman, Bubba Gumption, Sebastiaan Rutten, Callum Pagnozzi, Hennan Hoyce, Zeus Leonidas, Luis Torres, Fat Gorrila, Kenta Yuudai, Joe Jordan, Patrick Bateman, Convicted Killer, Connor Mac Burns, Julien Touret, Tony Slevin, Lan Mandragoran, Jt Colossus. All these are fighters who reached top 100 or higher that he beat (most of them were in their prime at the time he beat them), i am not sure if any previous GAMMA fighter had more top 100 ranked wins (Jeremy Tonal is ranked 4th all time, he most certainly had more top 10 ranked wins, but his career was way shorter, he retired at 31 years of age).
This induction also helped Dom Jaehnke moved higher up the all time manager list with 823 points (3rd all time), this is his 2nd fighter in the GAMMA HOF.
All in all, Gunnar was a guy who either got KOed or won by KO. He rarely ever had a finish by decision, it was either win or loss with KO, especially at the end of his career. In terms of longevity, it will be very difficult for anyone to ever surpass him, then again, i was saying the same thing when Raz Matazz achieved 67 total fights for GAMMA. Gunnar also had over 2 years outside of GAMMA, with the affiliate system, it makes it more possible for fighters to have longer GAMMA careers, so it is not impossible i guess to see someone contend with this record, but at the moment Gunnar sit's above the pile as the most durable and best 265/265+ fighter of all time.