Could someone help me understand GS and vacation.

I was on reserve from 11/1 till 11/14 and flew one 3 day trip. I have vacation from 11/15 till 11/21 and the rest of the month off. If I put in a GS during my days off and got used, I would get paid my reserve guarentee (about 52 hrs) + vacation (18 hrs) + what ever I pick up. I just can not GS on my vacation, it has to be my days off. Right?

Thanks.