I think that your scores will bounce back much sooner than six months; more like 2 or 3.
Do you have any other store-only cards (no Visa/MC etc logo on them.) If not, and if the higher CL isn't needed, you might want to argue back to a store-only card. And believe me, the CSR's will think that you're nuts.
The main thing with GEMB is to behave yourself, no lates, no drama, no questions. And they're not terribly generous with CLI's. But as long as you stay clean, you should be fine. (They're not my favorite bank, lol, but WFNNB is much, much worse --J.Crew, etc.)
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007