I screw the cap on real tight and put it in the glue area on my board like my other glues, it doesn't seem to harden like some glues do. I THINK {ouch} that one reason I get so much time on my opened glues without ever hardening is the climate I live in. about 6 or 7% humidity? Anyway, other then storing my CA in the freezer for long term storage I do nothing special with my glue.
Gorilla glue has a lot of uses or I wouldn't bother stocking it in my shop, I'm way too cheap for that. I just glued in a hard point, a piece of dowel in a balsa rudder with the GG. It expands and will fill in any slop between the parts.
I also like it for some hinging. After Pacer quit making the hinge glue I use trhe GG quite often.
If you spritz a bit of water on the parts it really foams up but it tends to over foam so I usually just leave the parts dry, it still foams up but not as much.