It means that you can't type any thing in the chat bar.
That they are in your clan/friends chat.
cc means clan chat ppl always say join so and so's cc so cc mean clan chat
When they don't know what to say
It means that you keep on putting that words and you got red on that chat. Then you like cannot chat and wait until you do not have it! Do not do that and have fun chatting to but do not do that alright?
Gtg means "got to go". G2G can also mean "got 2 go"
it means ok got to go
g2g
see you later
got to go this can also mean that the person do longer wants to talk to you
G2g
G2g
Olivia a.
g2g means got to go, ttyl means talk to you later
G2g
It means he Needs to Go do Something or .... he dose not want to talk any more
got to go