I certainly respect the knowledge of everybody who has replied already, but I'll add that I have experimented with light strings on my GS-Mini Koa and believe they are well suited for the guitar if you prefer lighter strings.
I am in the unique situation of owning two GS mini koas, and when I got the second one in January I thought I would experiment with different gauge strings. So I put some Martin Acoustic Sp Custom Lights (.011-.052) on my older mini. I have fell in love with those strings and they are on all of my full-sized guitars. On my new mini were the factory Elixir medium strings. I recorded a video of me playing the exact thing on both guitars to compare the difference. First I did fingerstyle, then I strummed.
Surprisingly, I found no volume differences between the strings. And I did not detect any difference in tone. Because I prefer the light gauge strings I ended up putting them on my new mini and I have not changed back to medium strings since.
So I believe that, if you prefer light strings, you should at least give them a chance.