gG is not the dual rating for ac and dc but instead shows the tripping curve. gG is for standart uses, gL is slow-fast (sounds stupid but means that it is slow for low overcurrents and very fast for higher ones)THE NUMBERS ARE DEFINITELY CONFUSING.
the smaller size triple holder vs the much larger size single holder...
from my research the gG is the indication on some of the Siemens fuses that indicates the dual ac/dc rating..
I can't tell you anything on the fuse holders at this time... what it all means ac vs dc
I am definitely not looking to pull these fuses under load...
I do not have the expensive shielded fuse puller for them at this time either...
A proper NH glove costs ~35€ here in germany, for your 24V system a simple NH grip would be more than enough. The glove is there to protect you when you pull an NH fuse in the grid with 230/400V incase there is an arc flash.