No, not Gnu C Compiler. Global Corporate Challenge, aka 100 days of pedometer-tracked exercise-related insanity.

The idea is simple: wear the pedometer provided, try to knock out at least 10,000 steps per day, log your steps on the website. Work in teams, lots of mutual encouragement, employers pay for it.

However …
10,000 steps isn’t actually very far, there’s a public leaderboard, and humans are competitive. I’m aiming for a 40k average this year …. ::o)