LGI 155/55 is still around;
http://www.tdnclan.com still plays occasionally. Most of the guys are MIA however.
It was also played mostly at 155% speed, but 135% was also used.
Most of the "GMC" guys from back in the day now post on
http://www.fpsnetwork.com but it's not that busy. The old site used to be
http://www.utgmc.com but I don't think Skag has done anything with it in a long while.
I still host game servers for both types (155/55 LGI CTF and 155/55 GMC DM)
Pretty sure
http://www.hncclan.com still has a 155/55 LGI server as well. Same story there as well, most of the guys are MIA or play other games now.
Only major difference between "GMC" and LGI 155/55 other than DeathMatch and CTF was the fact that GMC didn't use the instagib mutator all the time; usually the large maps had the ESR as a pickup somewhere in the map along with the other weapons, plus you had the ability to use the translocator which was almost necessary to get places.
but there is instgib options.
