Assuming this is part of a passage that has already been established as a glissando passage and the necessary pedal settings indicated at the beginning of it: Which of these two notations do you harpists prefer, or is there a better alternative?
I just checked on my Camac Atlantide Prestige. It is no problem at all to glissando down to that low G with my right hand thumb. I could indeed go down as far as the C below that G, but that would be my practical limit.