Did you bother to look on the SCRAM company's own website? Cripes.
This isn't a legal question and the answers are there I suspect, if not, the contact information probably will answer your questions.
If you've got SCRAM as a condition of probation, I suspect you will have to get a phone that you can plug their modem in. This practically means some land line. While it's possible to get RJ-11 connection for cellphones, I wouldn't bank on it.
There appears to be no location monitoring feature in SCRAM so I'm not sure why it would contain a GPS.
I'm not a lawyer, but I did stay in a Holiday Inn Express last night.