Question: How can I import friends from other gaming & social media platforms on on Social Club?
Answer: Social Club support importing friends from Xbox Live, Games for Windows Live, PlaySation Network, Nintendo DS, Facebook, and Twitter. Importing friends is a great way to connect on Social Club with friends you already interact with through games and social media.
First, make sure that you have linked your own Social Club account to your gaming platform and social media accounts: http://socialclub.rockstargames.com/settings/linkedaccounts
Then, go to http://socialclub.rockstargames.com/friends/import and your friends from other platforms will be listed at the bottom of the page. Choose "Add Friend" on any of the friends you wish to have as Social Club friends.