Student or Learner
"Did I tell you that I got a jod at a small family run hotel? Well, I'm going to have to reschedule the whole thing since I'm going to be working on Fridays and Saturdays." Is it correct to "gonna be working on ..." instead of "will work on ..."?
I agree with bhaisahab that strictly speaking it should be "going to be" (Standard English). However, informally, "gonna be" is heard all the time. Example: "I'm gonna be off work for a couple a days."
The form is fine. What do you want to say by putting just in the sentence- it could mean different things.