Perhaps as AncientClikk suggested they are a high-gee (gravity) variant of the Yazirians, perhaps from \\Scree Fron\Histran's pre-FTL colonization efforts?  The obvious change in terms of their Abilities, in this case, would be to subtract only 5 points from STR/STA and add it to INT/LOG same as always.  Adapting to a heavier gravity would make the Gorlians somewhat clumsy compared to their Yazirian cousins and would cause the build up of their musculature.  Also, these Gorlians would no longer have their glide membranes, atrophied from lack of use, except perhaps the occasional vestigial membrane running down the Gorlian's ribcage from his or her arms.

Battle Rage seems likely (from the example text above) to have remained intact, and Gorlian eyes might have adapted to a brighter source, unless we assume they are from \\Athor\Yast (the closest known/settled/explored high-gee world that the Yazirians might have tried colonizing at STL speeds; an Orange star only marginally brighter than \\Scree Fron's Orange-Red one).  Perhaps we could replace the Gliding Special Ability with Perfect Balance (Gorlians get a straight DEX roll to keep their footing where another character would slip and fall) from their maintaining the Yazirian arboreal lifestyle in the higher gravity.

Just some quick thoughts while I'm on my lunch.  What do you all think?

Star Lawman, over and out.

I always liked the idea of turning them into a mafia type organization.

Here is my original write-up of the Gorlians from years ago.  As much as I like the idea of them being a sub-species of Yazirians, I originally envisioned them as one of the 13 (or 17?) races in Frontier space.  So I also agree they could be their own species.  So, hey, who says we can't have both interpretations?  So here is the separate species version, and I'm going to see what I can come up with the simian version.  Actually, I forgot that I imagined them as more of a "bull" species, sort of like AD&D Minotaurs.  So here is that version.  This is very simplistic--my first attempt to create a SF species, so please forgive errors and otherwise novice writing!

Physical Appearance and Structure

Gorlians are large (8 feet tall, or about 2.5 meters) mammals, and are muscular bipeds, with powerful arms and legs.  They have thickly padded hands, each with four fingers and a thumb.  Their feet are large and padded, ending in five clawed toes.  Their torsos are wide and muscular.  Gorlians have bullish facial features, with a snout that hangs low over their chests, and small horns projecting from their foreheads.   Short, course fur covers most of their bodies, with color ranging from light brown for females to dark black for males.  Males are generally slightly larger than females. 

Senses

A Gorlian's sense of touch, taste, sight, and hearing is very similar to Human's.  Their sense of smell, however, is much more highly developed than humans.  They can easily smell other beings nearby, even concealed ones, and make excellent trackers (see Special Abilities).

Speech

Gorlians produce sound through a larnyx.  Thier have a primitive language that sounds very gutteral.  They can learn Pan-Galactic, as well as Humans and Yarizian languages. 

Society and Customs

Gorlians have a society based on strength and honor.  Their society is a similar to a tribal one, with tribes being referred to as herds by other races.  In the past, positions of leadership, such as the "chieftain", were won by fighting in gladiator-like duels to the death.  In addition, mates were chosen and won through combat.  In more recent times, positions and mates are fought for though non-lethal contests of strength and physical prowess that are still considered brutal. Chieftain positions, however, are still fought for to the death.  Chieftains rule their herds with iron hands, and cannot show fear or weakness.  

Female Gorlians can participate in duels, and can win mates and positions.  Sometimes a female will become a chieftain; Gorlian custom does not prevent this, as long as she can defeat and kill her predecessor.  Gorlians mate for life, and will have many offspring.  All week, diseased, or deformed offspring are killed.  Gorlins give birth to live youngs, usually two at a time.  A Gorlian born without a (fraternal) twin is considered very special. 

Gorlians are not a scientifically or technologically advanced race.  They can learn to use technology, but as a whole, their native technology tends to be primitive.  Gorlians are now often hired as "muscle"'; they make very good guards and thugs, and their tracking ability has enabled some to become excellent bounty hunters.  Most Gorlians favor melee weapons such as axes, and some have begun using powered weapons.  Gorlians are not unintelligent, but as a whole, they are more primitive than other Frontier races.  Individual Gorlians can be very intelligent, and may be able to learn technological skills.  However, all Gorlians have an innate animal cunning that can make them very dangerous.

Attitudes

Gorlians seem to get along best other mammalian races, such as Humans and Yazirians.  Their respect of strength and combat ability has lead them to have some affinity with Yazirians in particular.  They are contemptous of Vrusk and Dralasites, since these species are so different.  They are not sure what to make of the Rim races, but do respect Humma's brawling and carousing attitudes. 

The Gorlians as a whole have not had much contact with the Sathar.  But they are also very contemptous of the worms, due to the threat they present, and have no problem fighting them if need be.  But Gorlians do not have a centralized government, and have not been invited to join the UPF and serve in Federation military forces. 

It must be remembered that Gorlians are very touchy beings to deal with.  They have very short tempers, enormous strength, and are easily offended.  Any slight or insult will result in a violent response.  Bothering them is not an advisible thing to do.

Special Abilities

Incredible Strength.  All Gorlians are capable of incredible acts of strength.  All Gorlians get a +20 bonus to their Strength/Stamina scores.  When making Strength or Stamina checks, Gorlains get a +20 bonus modifier.

Referee note: Gorlians are so strong because they come from a high-gravity world.  On such planets, Gorlians can function normally, and are not penalized.

Tracking Ability.  All Gorlians automatically have the Tracking Biosocial skill.  If using Zebulon's Guide rules, they have the Tracking Skill for wilderness areas, and Stealth skill for developed areas.  Treat their sense of smell the same as Osakar.

Characteristics

Average Size: 2.5 meters

Average mass: 120 kgs for males, 110 kgs for females

Average Lifespan: 100 years.

Reproduction: Heterosexual, Viviparous

Body Temperature: 38 degree celsius

Ability Scores

STR/STA: +20

DEX/RS: 0

INT/LOG: -20

PER/LDR 0

There they are...please feel free to comment, criticize, use, adapt, whatever.  Hope you like what I've worked up.  Oh, I'm no artist, so would someone like to do some artwork?

And I can see those companies whipped up into a killing frenzy!  Thanks--

I forgot to include movement rates for the Gorlians: let's say they move the same as humans and Yazirians--10 meters walk per turn, 30 meters run per turn, 5 km travel per hour.

Am I understanding that not only do they have a +20 modifier to their actual STR/STA scores but they also have an additional +20 modifier to any STR/STA checks?

That really is a humungus defacto bonus, equivalent to something like +40 to STR/STA depending on the type of ability check... such as Melee attacks which would give 1/2 of this enhanced STR bonus plus an additional +20% chance to hit?!?  

Maybe I just misread, and the intent is (only) to have +20 to the stats and thus to the subsequent effects of  STR/STA being enhanced.  This would still be strong, but much more balanced.