Linux shell (bash) on vi's splitview
I'm afraid this feature isn't available in (presumably) Vim. It is on the list of possible new features. See here http://www.vim.org/sponsor/vote_results.php. At the current time of writing this is feature number two, add IDE features. If you want to vote for this feature you will need to sponsor Vim.
I use VIM in conjunction with tmux, which handles window splits very well. I just transitioned to this workflow from a combination of terminal and GVIM, though, and I encountered your question in looking for a piece missing from my old workflow.
I could run GVIM from the command line with the "--servername" flag and add files to that window with the "--remote-tab" flag. Now that I'm living entirely in the terminal with tmux, I don't seem to have the same option, so BBW. :/