Hi Andre,
As you can imagine, I get lots of requests for lots of avionics in all my aircraft. There are many logistical challenges with adding a G1000 specifically, but foremost, I'm not aware that there is a G1000 STC for any of the single engine Commanders. I'm not sure it even has the panel real estate, but I could be wrong. The PA-28 is a similar form factor and needed a panel redesign to accommodate the G1000. Do you have any examples of this setup?
I hope you're enjoying the aircraft! Please let me know if there is ever anything I can do for you.