GURPS limited to low powered? Well, I will say that I think the point system starts breaking down at 600 points but that's pretty high powered. (and by that I mean that the balance of skill costs to attributes gets a little wonky without a GM imposed limit on things) No settings? Well, Bane Storm is a setting, I'm not sure if they've released the Fantasy Adventures book as a pdf but it's got a few interesting ones.
Fighters of the Purple Rage involves the escape of the final seven gladiators from a grand elimination. They're hiding out in the sewers and there's a bounty.
Mordag's Little Finger involves a stollen wizard's staff that happens to be the little finger of a very much undead giant vampire.
Neither of those are what I'd call low powered.
Sahudese Fire Drill is a comedy hose job. You'll love it or hate it but you'll never look at oriental settings quite the same.
The other one I can't recall the name of but there's a gate to a shadow plane in it.
Anyhow, Low Powered? 600 Points?
Attributes:
ST 20 [100], DX 15 [100], IQ 12 [40], HT 15 [50].
Base Lift: 720 Lbs; Max Lift 5600 Lbs; Base Speed 7.5; Top Flight Speed 120 (240 mph)
Advantages:
Lifting Strength +40 [120]; DR 10 [50], Flight [40], Enhanced Flight Move x 8 [60], Innate Attack (Fire Blast) 6d6 [30].
Disadvantages:
Curious 11- [-10]; Dependant (Dear Old Dad) 11- [10]; Sense of Duty (Team Mates) [-5] Weakness (Water) [-10]; Enemy (equal power) 11- [-15]; Code of Honor (hero's) [-15].
Quirks:
Blunt and Humorless [-1]; Saves Dogs Over Humans [-1]; Odious Personal Habit: Cynical Nihilism [-1]; Flies While Reading the Paper [-1].
Skills
Climbing 15 [2]; Electronics (Audio Visual) 12 [2]; Flight 20 [20]; Judo 15 [4]; Karate 15 [4]; Innate Attack (Fire Blast) 21 [24]; Merchant (home appliances) 13 [8]; Politics 11 [1]; Scrounging 11 [1]; Stealth 15 [2]; Swimming 15 [2].
Doesn't look particularly low powered to me, anyhow. He's no Superman, but he's immune to 9mm pistols, can fly 240mph, and lift a couple tonnes. And if I'd done a straight mundane build he'd be insanely scary in whatever he put his mind to. Conan wouldn't break 500 points in 4th edition, now that he's paying less for strength and all that.