You can!
We have recently given all bloggers the chance to connect their Google Analytics accounts to their Get Blogged profiles. These traffic metrics are pulled through on every proposal to help you make an informed decision whether to hire that proposal or not.
Where the blogger has not yet connected their GA account, SEMrush traffic stats are displayed, but please be aware we are slowly phasing this out.
Traffic can be important to blogger marketing campaigns for a number of reasons, and we explain more here.