How does my gsd look for 4.5 months?

I have to say...you are one very, very lucky person to have a dog as beautiful as he is, let alone a GSD! I'm quite jealous. His ears should be up within a few more months. They should be firm and stiff by a year. I don't think you'll have a problem with that, but if they don't go up you can get some popsicle sticks and tape to help support it. There are a few websites that show you how. He' so big and beautiful and his name fits him great! Congrats!