I presume one of these exsists.... any ideas where to get one, Mic?
All versions except BeOS 5 PE have gcc builtin. The best version is said to be 2.9-beos-000224, but 2.95.3 is available, too. If you don't want to, you don't need to use command line, you can just launch BeIDE and start coding
For PE, DevTools kit is available here.