New feature claims to support importing GatherContent fields into D8 Paragraphs. There's a bug in the most recent beta, so ideally we'd wait for a new release. But this does seem to work
install paragraphs, gather content
Authenticate gather content module in drupal with api key in gather content
Create some content in gather content using a template
Create content type in drupal for that content, using a paragraphs field
Configuration > GC > content mapping
Configuration > Gather Content > Import content
Paragraphs seem to import in order they are in gather content