Sure it's been asked before, but I'll make it short:

If you're reserve and GS a 4-day trip that starts on a reserve day, and covers two X days with the fourth day originally a reserve day do you get GS pay for the fourth day?

In other words, assume a 4 day GS trip is awarded on day 1:

1. RES
2. X Day
3. X Day
4. RES

Does the X Day get paid back on day 4 and thus result in GS pay for day 4? (not to mention PB days for day 5 & 6?)