I know I could export difference addon settings of GP, but I would like all the settings to be exported so I could export it in one go to my sites, could you please let me know how to achieve it?
As far as I am aware, only those settings available within the import/export addon are allowed to be exported. This may well be something Tom can enlighten us on further, but to my knowledge this is limited at the moment.
I am sure you already have seen the guide but for those who may not have please view it here: