GH3 as a photography camera?

Ok money's tight but I've had an offer that's hard to pass on for a GH3. What's it like as a photography camera? One particular feature that interests me is I've read you can stack up to 4 raw images in the camera, is this correct and could you do very basic macro stacking? I have an EM5 and a G10, I was semi considering this because the em5 is battered and maybe time to give that a gentle, home studio camera life as I can't source the replacement parts, g10 is lovely but obviously lacking in a fair few ways (mainly sensor having very limited iso performance and the lower resolution does get in the way of cropping), but the fact you can stack images is a very appealing idea. Any input is welcome, basically every review just dives into the video features that are a low priority for me

Update: I bought it and if I get time I'll give it some feedback on here