I don't have any Gordon profiles, but I do have some information for you regarding the Gordons & the Gordon house (wardhouse).
information on the house & resident is at:
I think I may have found Isabella's parents on Scotland's People http://www.scotlandspeople.gov.uk in the Old Parish Registers.
There are only 3 births for an Isabella Gordon between 1742 & 1750
I'll list all 3 here:
1) D.o.B 21/06/1743 GORDON ISABEL ALEXR. GORDON/MARJORY ROBERTSON F BELLIE /MORAY GROs Data 126/00 0010 0057
2) D.o.B. 0/12/1747 GORDON ISABELL JOHN GORDON/ISABELL BURGESS FR128 (FR128) F CABRACH /BANFF GROs Data 177/00 0010 0118
3) D.o.B. 08/04/1745 GORDON ISABLE JOHN GORDON/ F CABRACH /BANFF GROs Data 177/00 0010 0112
Hope this helps.