Hmm, kinda interesting really. My C99 father was selected for (among other things) a distinct fruity pineapple smell quite noticable in aroma from stem rub...and my select Swt3 (mother) for her sweet candy aroma.
Some folks' noses have a difficult time differentiating between the mix of aromas going on in fresh growing herb that can take on what some refer to as a 'citrus' note. Having said that...of course it's genetically possible that there are some GF recessive genes passed on, from either parental side of Sweetest Cindy99. Imvho...I find GF phenos of C99 to be less interesting from a taste standpoint, basically because the majority of GF phenos from many different varieties I've tried (grown by others) over the years have had a propensity to lose the citrus aroma when dried/cured and don't taste as attractive, to my palate anyway....and thus why I choose to breed more towards the fruity, candy side of things.
On the other hand...GF buds tend to be dense, and can be quite frosty. The only two exceptions to my GF critique that come to mind are a very SPG dom Swt3, or FMS's Grapefruit.