First you need to create the mapping between the GatherContent template and the Post Type. Follow the steps in mapping setup for this.
Select Post Types and content
Select the Post Type and then the content you would like to import from WordPress. Then select the bulk edit option.
Select "GatherContent" Sync
Assign template mapping and "Push" content
You can now select the content, click "Assign Template Mapping", choose the account and template to associate with the WordPress content. Once you've done this you'll be able to push all written content from WordPress and the Items will be created in GatherContent. In the future we will look to also support Importing of images from WordPress.
You can also perform this action at a post / page level in WordPress:
Push from the post editor meta-box
If you have not associated your WordPress content with a Template Mapping, the post editor page meta-box will provide the opportunity to do so. So you can also push content from WordPress, which is not currently in GatherContent.