Gervais and Steve Merchant have made The Office (my favorite sitcom of all time), Extras (my second favorite sitcom), Life's Too Short (really disappointed me, good enough for one watch but nowhere near as great as their first two works), An Idiot Abroad (fantastically funny travel show starring their former radio producer Karl Pilkington), Cemetery Junction (their only film, like I said it's a funny move and I suggest checking it out).
Gervais's solo works include his standup specials (which I love, because I like his commentary on religion, fat people, and other shit), Invention of Lying (actually a collab with another dude, the concept is very unique, and it's a decent movie, but not his strongest work), Ghost Town (he only acts in it, but I like this one far more than Invention of Lying. Really sweet rom-com with The Sixth Sense mixed in), and Derek (far better than Life's Too Short, but not without its problems. Still, it's a funny show and I love the character Douglas played by Karl Pilkington in his first acting role).
Steve Merchant is working on a show in America called "Hello Ladies" where he plays an Englishman looking for love in LA. I'm really looking forward to that one:
http://www.hollywoodreporter.com/live-feed/stephen-merchant-pilot-gets-series-385381---
Yeah, I'm a Gervais nerd.