Unfortunately, no. Google Classroom is a way to manage web-based content (links), specialized apps, and Google's own tools for the classroom, but it does not allow for the import of course content from IMSCC or ZIP files, nor does it support LTI connections.
All NROC Courses require an LMS that supports IMSCC import or, in some cases, ZIP format. Additionally, both NROC Developmental Math with PreAssessments and NROC English require an LTI connection.
Until Google Classroom supports these industry standards, NROC courses will remain incompatible with Google Classroom. NROC courses can be installed in standard learning management systems that support IMSCC and LTI, such as Moodle, Canvas, Blackboard, Sakai, Schoology, and D2L.