This achievement requires a bit of effort on your part. You must have someone on your friends list who has a gold medal. You then must beat their time to get the achievement. This can be a difficult achievement, because some of the golds are difficult and to beat someone else that already has it, can be even more difficult. You can use the Challenge Trading thread to try your best to set this up, as many of your friends probably aren't playing this game. If it is inactive and no one is posting, just go to the leaderboards. Find the people who just barely made a gold medal. Now try adding them and if all goes well, you should have a few random people to play against if they accept.
To find people, use this thread HERE.