Yes, you can.... To add your WordPress blog posts to your GoCentral site you would click Add a Section, then choose the Blog Widget, and select: External blog feed. Then input the URL to your WordPress Blog RSS feed.
However.... Why not use WordPress for both? You can setup any theme to have a "Blog" section along with other website pages. This way you only have one site to managed -- and WordPress offers more features and functionality too.
Judith "Do one thing every day that scares you." ~ Eleanor Roosevelt