There's been a timetable published:
www.parliament.scot/chamber-and-committees/votes-and-motions/S6M-07321
That the Parliament agrees that, during stage 3 of the Gender Recognition Reform (Scotland) Bill, debate on groups of amendments shall, subject to Rule 9.8.4A, be brought to a conclusion by the time limits indicated, those time limits being calculated from when the stage begins and excluding any periods when other business is under consideration or when a meeting of the Parliament is suspended (other than a suspension following the first division in the stage being called) or otherwise not in progress:
Groups 1 to 3: 1 hour 45 minutes
Groups 4 to 6: 2 hours 30 minutes
Groups 7 to 9: 3 hours 50 minutes
Groups 10 to 12: 5 hours 30 minutes
Groups 13 and 14: 6 hours 30 minutes
Groups 15 and 16: 8 hours
Groups 17 to 19: 9 hours 15 minutes.