1. Gmod is Garry's Mod
2. It's fun, but i get bored alone D:
3. I'm not creative so i'm really bored
4. I too recommend Counter Strike: Source
5. I don't know how to script, so i'm sorry can't help ya there, if i could script, i'd make a walk script D:
6. A thing i find fun to do is throw a grenade at you foot, hit 1 twice to go to the Gravity Gun, and quickly pick up and throw the grenade, also, in the room behind the spawn in Construct, aim at the floor, shoot the Combine Gun's secondary shot, hit 1 twice to go to the Gravity Gun, then quickly try to grab the Combine Energy Ball you shot, then shoot it at an enemy, or let it go and watch it bounce around :D