You pay a premium for small size, and that pretty much sums up the new Panasonic GM5. It's a capable camera, but it's a bit pricer (and smaller) than similar models.
The Panasonic GM5 replaces last year's GM1, and there's not too many big changes. An electronic viewfinder has been added, however, something the previous model didn't offer. To make room for the viewfinder and keep the camera small, there's no built-in flash, but the GM5 now includes a hot shoe slot and the bundle includes a flash. While the camera's still tiny, there's now an extra accessory required (the flash), but it's a worthwhile sacrifice to have that viewfinder.
The GM5 uses a 16 megapixel Micro Four Thirds sensor. It's capable of shooting JPEG, RAW, and the 3D file type, MPO. The maximum shutter speed is a nice, quick 1/16,000. Add that to an ISO sensitivity up to 25,600, and the Panasonic GM5 looks to be pretty capable. Speed-wise, it hits a 5.6 fps burst speed, which isn't anything fancy but sufficient enough for many.
The biggest feature of the GM5 is the small size--it weighs about 7.4 ounces and is about the size of a point-and-shoot. Once you add on a lens and the external flash though, it's not exactly pocketable (and you should never really store any camera in your pocket anyway).
The Panasonic GM5 looks to be a solid camera--it's just a bit pricey considering the feature list. But, if size is on your priority list, you likely won't be disappointed with it either.
For More: See our list of the best mirrorless cameras.