Today I went to Gridania to level up my Carpenter as well as to take Guild Test Quests. I wanted to get the lv 50 saw from quest reward, so that I may be able to attempt Spruce Lumber recipe. Then, I went to Bentbranch to gather some Elm Logs and decided to time myself to see how long it takes to regen my GP to full, as I wanted to use Blessed Harvest II which consumes 500 GP in order to increase gathering yield.
Once I spend my GP activating the skill, I started timing. When I was fully active, and continued to keep chopping at the trees as fast as I could, it took me 2h 30m game-time to get my full GP back. However, when I just stood there idly, my GP would get back to full within 1h 45m game-time.
I guess this is because the natural regen tick rate is a bit faster than the fastest we could log/harvest the nodes, as while gathering at each node, the natural regen will be frozen and not moving at all. And each successful gathering attempt gives back only 5 GP.
So, while gathering, if you only want to gain and spend GP for specific result, standing (or walking, running, chocobo riding, doesn’t matter) and waiting for GP regen from natural regeneration rate will make it faster. However, if you are gathering for quantity, keep logging or digging will earn you more items in the same span of time, but your GP will regen a tad slower.