Bala, I think you watch shows on high-speed (explains how you are able to watch so many)
![](images/smilies/default/titter.gif)
Just kidding.
Gus didn't let Shawn borrow his card, Shawn stole it, Gus even said that he was a bad as the other thieves. Also Gus does get paid, they have shown it over and over in many episodes, the police department writing them (yes both of them) a paycheck.
The friendship is a bromance, as many episodes have shown they have been friends their whole lives pretty much, so Gus knows exactly who Shawn is, and there have been a few episodes that show how much each means to the other, which is why he was so sad looking when he find the ring, and also when they left for their weekend. He feels that Shawn is leaving him. I just wonder if he will get the game with the ring to Shawn, as Shawn doesn't know that they found it.