My guess would be to just insert the gusset on the other side. In other words, if you worked across the palm and then started the gusset for the left one, then knit across the top of the hand before you start the gusset for the right one.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry