No, not directly. The vCard data is compiled from the information you provide in your GravMe or linked profile.
The vCard format is a rubbery standard. Different devices and contact applications all export and import vCards in similar yet slightly different ways. These differences mean that all but basic contact information may not transfer between devices.
We have rigously tested and formatted the GravMe generated vCard in a way to ensure maximum cross-device vCard compataility.
If any one is interested, here’s a technical article covering the interoperability of the vCard format – The sad story of the vCard format and its lack of interoperability