Many folks have asked about this, and with Panasonic's confusing bloodlines/naming conventions, I thought I'd take a swag at how it shapes out. Some points are debatable. I identify 5 body types, listed in order of earliest Panasonic release in the bloodline. Again, debatable: GX (compact rangefinder) G (DSLR style shooter) GH (video, DSLR style) GF (sub-compact, entry level) GM (sub-compact, shooter-level) GX (compact rangefinder) Lumix L1* (2006) - GF1** (2009) - GF2** (2010) - GX1** (2011) - GX7 (2013) – GX8 (2015) and GX85*** (2016) - GX9 (2018) * - as a 43 camera with a mirror/OVF, the L1 is much larger, but given what it was shooting for, I'd put it in the GX9 bloodlines. ** - the GF1, GF2, and GX1 had no internal VF, but are generally characterized as "range finder style" *** - though launched in separate years, this is still a line split as with the G2/G10, below G (DSLR style shooter) Lumix L10* (2007) - G1 (2008) - G2 and G10** (2010) - G3 (2011) - G5 (2012) - G6 (2013) - G7 (2015) - G85*** (2016) - G9 (2017) * L10 is, of course, a 43 camera with a mirror, but I believe it to be antecedent to this line. ** G2 and G10 was the first time Panasonic did a split in the same line. G10 was more entry-level than G2. G10, IIRC, was not well received, and quickly was a bargain-bin camera. *** WTH is with the name switch?? GH* (video, DSLR style) GH1 (2009) - GH2 (2010) - GH3 (2012) - GH4 (2014) - GH5 (2017) - GH5s (2018) * Interesting there are no footnotes really needed in this line. I am guessing this is where Panny is making it's money. A clear vision, differentiated, market-leading, and steady. GF (sub-compact, entry level*) GF3 (2011) - GF5 (2012) - GF6 (2013) - GF7 (2015) - GF8 (2016) - GX850 (2017) * What's in common: the bottom of the shutter button is at level or lower than the top of the camera mount, the camera is intentionally compact, controls are intentionally simpler/fewer, there is no flash mount. GM* (sub compact, shooter level) GM1 (2013) – GM5 (2014) * You could make an argument that the GM series is part of the GF series, and is a split much in the same way as the G2/G10 or the GX8/GX85, but as there are many GM loyalists who would care nothing for the GF, I don’t want to incur their wrath, lol. Plus some hold out hope that the GM series will not die, though it’s not looking good.