Harris County District Courts Houston/Harris County
"When and where does the Grand Jury meet?
Ten new grand juries are impaneled for each of the January and July Terms, with five serving for three months. Each grand jury meets for two scheduled days a week at 1201 Franklin, 3rd Floor, Houston, Texas 77002. The grand jury's workday can last as long as a regular work day, but is often shorter."
I had a friend who did grand jury duty. She said that at the beginning of their months long obligation was spent learning of the law. They didn't jump into the case of their first day. May be different there.
Oh yeah, the compensation....
"Will I be paid for Grand Jury Service?
Jurors will receive $6 for the first day of service. Jurors serving more than one day of jury service will be compensated at a rate calculated by the State Comptroller based upon available funding."
NOTE that above is Harris County/Houston... Below is Travis County/Austin
Grand Jury/Intake Division
"At any given time, Travis County has three grand juries who have been selected, empaneled and sworn in by one of our 8 District Court judges who hear criminal cases. Each grand jury sits for a term of typically three months, meeting at least twice a week.
A grand jury is tasked with determining whether there is sufficient probable cause to return an indictment, which is the formal written statement of a grand jury accusing a person of a criminal offense. {Tex. Code of Criminal Procedure, Art. 21.01.}"
ETA It says above that Harris County is 6 months, yet current grand juries started their three month panel in November...through January according to link below at 301 fannin street in Houston? I guess that's 5 panels for 6 months, and 5 panels for 3 months at all times to overlap? The current 3 month one is November through January.
https://www.justex.net/JustexDocuments/0/Grand Jury Information/Grand jury terms 2019.pdf
In Texas, the grand jury votes, at which point nine of the 12 grand jurors must agree there is probable cause of your guilt before they can indict you and take the case to trial.