Hi @tarogers2000. Yes, this is something that Gibbon can do. While Course Requests are not built into the core, there is a module called Course Selections that is quite flexible and can be used for a range of course selection processes with various constraints on selections that students make. The module can be downloaded from the Extend page on the Gibbon website: Extend - Gibbon
I developed the module for a school that I support, who are happy to share the module for free, however there currently isn’t public documentation for the module. You can find some good info in some of the posts on this forum though, such as: Course Selection Module how-to - #3 by richardg
Credits are not built into Gibbon by default either, as they are quite dependent on a particular curriculum or school system, but the Custom Fields system is quite flexible and will let you add a Credit value to either courses or classes in the system.