IP issues in writing a ghci adaption?

Hey everyone, If one wants to write a ghci-like application for the C++ language (and/or other languages as well FTM), which is not a derivative work of the ghci source, are there any intellectual property issues that need to be addressed? For example, would this tool be allowed to use similar syntax and commands as those in ghci (:r, :l etc), have a similar name (gcci?), carry some specific license, etc, or is the field clear? The reason I am asking is of course that I am currently working on something like this (although it will probably differ from ghci in terms of design, implementation, features etc) so I am thankful for any answers! kind regards, Christopher Svanefalk, Student (comp.sc.), Univeristy of Gothenburg, Sweden.