Oh, I also don't like the "A gurrash weighs upward of 800 pounds". That's fine for a Large-sized Gator Man, but seems too heavy for a Medium-sized Gurrash.
Regular lizard folk are almost as tall (6 to 7 foot) and only weigh 200-250 pounds. A 7 to 8 foot tall gurrash should weigh about 50% more, assuming similar proportions.
Revised proposal...
Gurrash
Advancement: By character class
This reptilian humanoid has dark green scales and an alligator-like head, with prominent sharp teeth and slitted red eyes.
The gurrash are a violent, warlike offshoot of the lizardfolk race. Gurrash spend their time hunting and making war within the unforgiving bayous they call home.
Also known as "gator men", gurrash were created centuries ago by evil spellcasters merging together regular lizardfolk with alligators. They were intended to be warrior-slaves for an empire that is now long dead. A few gurrash escaped and started to breed in the swamps, eventually becoming the reptilian scourge they are today.
Gurrash refuse to negotiate with strangers, preferring acts of aggression. These lizardfolk consider themselves the mortal enemies of shazaks, usually attacking them on sight. Gurrash will try to exterminate or drive away any shazaks who live near their homeland. They frequently war with other neighboring tribes, including other tribes of gurrash, but put their hatred of shazak above mere territorial rivalry.
Most gurrash worship demon lords, who sometimes grant gurrash tribes a lizard king leader. Gurrash tribes who share the same demonic patron usually have extremely good or bad relations - either cooperating very closely, or seizing any chance to murder their "heretical" neighbors.
Gurrash subsist on lizards, alligators, fish, and the occasional shazak. Raiding parties of gurrash occasionally raid isolated humanoid settlements for fresh meat to supplement their diet.
A gurrash is usually 7 to 8 feet tall with dark green or brown scales. Its tail is used for balance and is 3 to 4 feet long.
A gurrash can weigh from 300 to 400 pounds.
Gurrash speak Abyssal and Draconic.
*SNIP*
Gator Folk
The gator folk are a brutish variety of gurrash lizardfolk. They are throwbacks to the gurrash's original lineages, when evil sorcery created the gurrash race by merging lizard folk with large alligators. Gator folk grow slowly throughout their lives like alligators do, and ancient gator folk can reach the size of ogres or small giants.
Gator folk are even more primitive and vicious than regular gurrash, but their culture is basically the same (including their hatred of shavak and demon worship). Gurrash and gator folk recognize each other as kin, and a gurrash tribe's relationship with a tribe of gator folk will be as good (or bad) as those with another tribe of gurrash, and vica versa. Gator folk tribes are usually ruled by clerics, who lead their people in horrible sacrifices to demonic beings.
Gator folk usually advance by humanoid hit dice (see below) and use crudely made greatswords as weapons instead of tridents. Those few gator folk with character class levels will generally be in control of their tribe. Gator folk have the following statistics, anything that is not noted is the same as regular gurrash lizardfolk.
Attack: Claw +4 melee (1d4+2) or greatsword +5 melee (2d6+3/19-20)
Full Attack: 2 claws +4 melee (1d4+2) and bite +2 melee (1d6+1) and tail slap +2 melee (2d4+3); or greatsword +5 melee (2d6+3/19-20) and bite +2 melee (1d6+1) and tail slap +2 melee (2d4+3)
Advancement: 4-6 HD (Medium); 7-9 HD (Large)