No. They will be placed on your next reserve day, and will start when you duty off, so you don't even get "calendar" days. The only exception to this is if you only have X days remaining in the month and they can't give you the PB day in that month.
This IMO is a good thing, as the days go into your Bank and you can then place them where you want them. My favorite way to use PB days is to maneuver my sked so I have 5 on call days in a row. Then put a PB day on day 3 (subject to coverage of course) and boom - you now have a stretch of 2 on, 1 off, 2 on. This works really well in a "hungry" category where guys are gobbling up WS's like crazy. ATL 73N was like that last winter, and I knew if I got down to 2 days left then I was basically home free. Using this strategy would buy me a week off by only using 1 PB day.
Also worth noting, PB days automatically become supplemental vacation days if you don't use them by the end of the calendar year in which you earned them (ie December 31st each year). They are FAR more valuable to me, from a sked manipulation standpoint, to place where I want them, than to have them appended to my vacation. YMMV.
Congrats on the GS
I'm hoping to pick one up near the end of the month for the reasons spelled out above.