[inquisitor]

There are no differences in the GPRS-protocol for the different IP-based services. Years ago when WAP 1.1 was in place there was a WAP-Gateway, that had to be configured, but today WAP 2.0 uses direct http-connections, so practically there's no difference whether the GPRS-connection transports a WAP-page, a desktop website, eMail or any other type of data.
However some operators run APNs (access points) that block some or almost all ports, so e.g. they can sell full web access for a higher price than just mobile browsing (which would be limited to port 80 and 8080). But this happens on IP-basis, so a higher protocol layer than GPRS.
Regarding the GPRS-connection, there's no distinction what IP-service is being transmitted.