No, it's only in the main Runescape the Grand Exchange was made.
Grand Exchange
The first Runescape player to say g.e. for grand exchange was WEEDYMUN.
grand exchange
Grand exchange
Grand exchange
At the Grand Exchange.
the grand exchange on runescape
There is no special "Grand Exchange account". You have your RuneScape account (just log in normally); you go to the Grand Exchange and start buying and selling things. First, you have to talk briefly to the guy (NPC) with the megaphone, south of the Grand Exchange. This is once only.
at Grand Exchange
Grand Exchange
Buy it in the Grand Exchange