Is Jeff Gordon friends with Jimmie Johnson?

I believe Jeff Gordon and Jimmie Johnson were better friends earlier in Jimmie's career. Jeff did encourage Jimmie to start driving full time in the Nascar Cup Series back in 2002 and is also a co-owner of the #48 car, along with Rick Hendrick. But as time passes and Jimmie keeps on winning more races and championships, you're starting to see Jeff's frustration mount more and more.