My GP-100 trigger is heavy! When I shot 300 rds qualifying, it gave my trigger finger a heck of a workout. I'm going to send it to a local shop fore action polishing, lighter spring, etc. After send my 1911 in to the "bugs" worked out.
Trigger on these, like SP-101 is never, well rarely, totally smooth and sweet out the box but it is usually reckoned that use and dry fire will make them better. If for carry then fitting lighter spring is not probably wise tho it does make trigger feel a bit better.