Glo-Stick is simply a spelling mistake for GLOW STICKS.
A glow stick is a plastic tube that once bent and 'snapped' glows in a florecent colour. Often associated with nu-rave and clubbing.
YOU: comin to the Rave saturday?
ME: yup got my glo-sticks ready and all
YOU: dude! u got glow-sticks!?? Man , I wish !
ME: g2g ! cyu then!
Chat-speak acronym for "Catch up with you later"
When spoken out, it resembles "coool," signifying a positive end to a conversation.
Bob: Damn that was a fun night.
Greg: Kk cuwyl. I gotta repeat last night tonight haha.