i have had my first GBRs for over a month now, they were very skittish whenever I went near tank at first but now are much happier after I introduced 10 cardinal tetra as dither fish. They spend nearly all of there time now out in open water and 3 of the 4 show some amazing color! I just love my GBRs.
One thing to note is weekly W/C are recommended they will not do well with nitrates of 20>, lots of hiding places as pointed out are required to make them feel secure.
What main size tank do you have?and are you considering getting more GBRs as with a male and females you will really see there great behaviour also and more likelihood for colorful displays.
If introducing GBRs to a community set up beware that they may refuse to compete for flakes, I started mine off on
brine shrimp and now feed flakes also.
See
http://www.aquaticcommunity.com/cich...manblueram.php for sexing images and more info on these little guys - hope this helps.
Good luck