Hello and welcome.
We organise marks as follows in order to keep us in line with the UK motoring press (generally) and the US-based Honda Jazz/Fit forum, Fitfreak, which pre-dates Clubjazz:
Mk1 / 1st generation - Feb 2002 to Oct 2008*. GD1-GD9 & GE2-GE3 chassis codes.
Mk2 / 2nd generation - Oct 2008 to Jul 2015. GE6-GE8, GG1-GG5 & GP1 chassis codes.
This is your JazzMk3 / 3rd generation - Jul 2015 onwards. GK chassis code.
*There was some sales overlap between mk1 and mk2 due to the 2008/09 economic crisis - some Mk1s appear on 09 plates.
Some websites may interpret the marks differently as Honda briefly sold a model called the Jazz in the mid 80s. Also, sales of the Mk2 and Mk3 started in other countries at least a year before the UK (two in the case of the Mk3).
The colour of your Jazz sounds like Ionised Bronze Metallic.