If you booked thru carnival then you can log onto their website and go to my reservation. On the left side of the page should be an area that says modify booking. Click on that. You should be able to see your room # from there.
Apparently, if you did not book thru carnival this may not work.
I don't know if it makes a difference, but did you get to the "my reservation" page? Several people have said they can't get there, but none of them booked directly with carnival. I would assume another option would be to call Carnival and give them your booking #. 1-888-227-64825
I can get to the reservation page and this is what is on it.
Left hand side of page
7 day eastern caribbean from Miami Fl on 5/7/2005
Eileen Gray only 152 days until your cruise
booking no: 8BX145
Middle of page
Complete on line boarding pass
Itinerary Easter Caribbean
View next cruise
Ship: Carnival triumph
IT asks to view next cruise because I have a Western Cruise on same ship right after the Eastern Caribbean.
But does not give me the option to modify booking. I am curious to find out if I am mid ship like I requested because last time I was mid ship and I did not notice the movement. I get sea sick very easily and mid ship I was fine.
I am pretty sure that you have not been assigned a cabin as of yet. You have a GTY booking which means that they can place you anywhere so long as it is at least the Catagory you booked or above. If you HADE a specific cabin you would know you cabin # at the time of booking. You will probably not be assigned a cabin until a month or two before sailing date at earliest and maybe not until you are ready to board.