It doesn't sound like you understand the relationship between Paybands and General Schedule.
base pay on a GS is the same regardless where you're located. It is the locality adjustment (if you're in an area that is within a locality adjustment) that differs, as it's Base Pay + Locality adjustment (if any) that determines the total salary. Your paycheck stub breaks it down the same way.
Paybands are GS scale range equivalent, but without all of the defined steps (1-10) within a grade. So, a decent employee may be able to max out a band relatively quickly (compared to waiting a long time for automatic step increases). But the bands are defined with the limits of the lower grade, step 1 to the highest grade, Step 10. For example, DP-III, minimum base pay is a GS-12 Step 1 with the max base pay of GS-13 Step 10.
Not all agencies are on Paybands though. Some use both GS and Paybands, as when you get high enough, you're switched to the Payband.
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But the OP didn't mention if it was on a fixed scale or payband position, since he never posted the job announcement for people to take a looksee.