Georgetown: GBUS major vs IBUS major?

Global Business (GBUS) is part of the School of Foreign Service (SFS) while International Business (IBUS) is part of McDonough School of Business (MSB). They seem very similar but I know that GBUS students can take classes in MSB while IBUS students can’t take classes in SFS, correct? Also, what are international/study abroad opportunities like for both? And are there language components or requirements for each major? Thanks