When i got my G5200 about 12 yrs ago, I looked into this. After researching, I abandoned the idea for several reasons. Chief among them was the fact this platform does not have a 2 speed rear end. Any kind of serious blade work would be limiting. Strictly my opinion.
I do have the front blade. It moves snow superbly and does ok for loose dirt.
Now, adding hydraulic lift for the deck has merit, and not to difficult. This mod I'm still contemplating. I'll bet yours has this already.
Still, I would be interested in seeing such a mod your asking about. Fabricating a sub frame 3pt to bolt to the rear end would be easy if you got the skills.