With the new update you earn honors daily that you can give out to other players. Starting at level 20 you receive 2 honor points per day when you login and they stack up to 5 total only.
The three different honors are Helpful, That Was Fun, and High Five. There are a few ways to give these out.
1. Go into your guild and open up the guild roster. Select any one of your guildmates and as soon as you do you will see the screen where you can choose an honor to give them. To earn the achievement I gave my guild leader a high five and this popped right away.
2. Go into global chat and select any player on there and do the same as above.
3. After completing a ranked pvp match it will bring you to a screen showing some of the match info and it will ask you if you would like to honor the opponent with a That Was Fun Honor
Any of these three methods should net you this quick 10 gamerscore.