Tutorial how to control GDB from an external process (similar how C::B does it)

[Napoleon]

I have a project at Uni I've been asked to do where I need to launch GDB send commands to it from a controlling program.  GDB will, in turn, be used to debug another process.  In essences, pretty much how C::B operates GDB.
Would anyone be able to share a link to some information or tutorials on how this can be done?

The controlling process is written in Obj-C ++ and runs on both OSX and Ubuntu.  I'm planning to work on it in Ubuntu using C::B.
The process that GDB will debug is written in C++.

Cheers,
Nap

[ollydbg]

Communicate gdb through command line pipe.
Also I suggest you use the gdb's MI interface.

[oBFusCATed]

Another option as far as I know is to use the python api, but this is not a place where you'll receive enough up to date information.
It is best to ask your question on the gdb mailing list, there you'll find more knowledgeable people about this matter.

[Napoleon]

Thanks for the hints.