Looks nice! Make sure you give it lots of water in the container it is in, and it might need to get repotted next year since it looks like its getting pretty big for its pot. I think it will do fine in a unheated garage. I have overwintered philodendron's mexican petunias, and yucca guatemalensis in my unheated garage and they are all zone 9 plants (the philodendron and mexican petunia might be considered more of a zone 8 plant though).

Good luck!
-Alex

Wow! Beautiful palm!