QUOTE (MicrosoftGuy @ Jul 22 2009, 02:36 PM)

Who says adsense is not for GPT blogs? I never heard of that.
It's against Adsense TOS to have Adsense ads on a blog/site that consists of "incentive content" to my knowledge. I don't know their official wording, but I've heard numerous times that people have been banned for having Adsense on GPT blogs, especailly blogs focused on PTC sites.
To the OP, sell banner ads, sell reviews, sell content/eBooks you've written, promote affiliate programs, etc. Since this a GPT blog, it would probably be wise to promote your own programs that you want referrals for.
There are many ways to monetize a blog. Of course, it's going to take a while to gain some authority and consistent readership, but that's part of blogging. If you're serious about it, feel free to PM me if you have concerns or just want to discuss the topic.