Had never heard of GPT (Get Paid To) websites, but apparently it's a way to make a little extra cash. Not sure how much exactly you're looking to make or even how much you can actually make from GPT, but it might be something to look into. Here's an article I found that explained the program in detail: http://www.nannytomom.com/financial/gpt-programs-1.php

I googled GPT and there seems to be a few credible programs out there.