Have you tried ConqueGDB? It lets you start the GDB from within your vim session and uses your vim buffers to show the current file. I recently started using it

Have you tried ConqueGDB? It lets you start the GDB from within your vim session and uses your vim buffers to show the current file. I recently started using it and didn't really get into familiarizing with it yet, but it seems to integrate the gdb quite well. I am uncertain whether or not you can set breakpoints within the code though.