Is Gallup announcing a poll today?
No, they are not (as per their blog).
They did not poll Tue and Wed. They will start polling today.
They may not (still unsure) release a poll till Monday. In their blog it seemed like they wanted to collect a four day rolling sample
Gallup will not report today because they did not poll either Tues or Wednesday. They announced they will begin polling again today so we should see the numbers begin again tomorrow.