My understanding is that no matter what happens in the tournament Graham travels to Gate City. And Union travels to Richlands. I could certainly be wrong.
Will be a very good games. All of theses teams cause problems for each other.
Richlands and Graham's conference 39 plays Union and Gate City's conference which is conference 40. Assuming all teams win over the next week as expected and conference 39 comes down to Graham and Richlands and conference 40 comes down to Union and Gate City. The winner of the final conference 39 game would host the loser of the conference 40 game and vice-versa. This means......if Gate City wins and Richlands wins, Graham travels to Gate City and Union travels to Richlands. If Graham wins and Gate City wins, then Graham would host Union and Richlands would travel to Gate City.
It's my understanding that the conferences get to decide where their tournaments are played. Conference 40 (Gate City and Union) automatically has its tournament at the regular season number one seeded team. This year, that is Gate City. But, Conference 39 (Graham and Richlands) evidently does not do it this way and they rotate. This is where Richlands (the number one seed in the regular season ahead of Graham) kind of gets the short end of the stick as they will likely face Graham in the conference final, and that would be at Graham. Both teams are very, very close and home court obviously matters with these two as it showed in the regular season.
The above is my understanding of how the seedings work and who travels where, etc. I could also be wrong. However, one thing I am not wrong about. All 4 of the teams you mentioned will Not cause problems for each other in my opinion only. 3 teams could cause problems for each other in Graham, Richlands, and Union. Gate City is 10-18 points better than all three of them. If any of these 3 teams beat Gate City, it would be a monumental upset.
Martinsville is still the team to beat in AA Virginia, but Gate City has closed the gap on them some this year as Martinsville is slightly not as good as last year, and Gate City is much better. What does that mean? I don't know because Martinsville beat em in the playoffs last year by around 30 or so points and they dominated the state title game against Greensville County by 32 points winning their 15th or 16th state title, so to say Martinsville is slightly down from where they were last year does not mean much. That may just mean they win the state title by only 10 points instead of 20 or 30. But, if any team can beat them or at least make it close or interesting in SWVA, it would be Gate City. They have legitimately 2 future Div 1 players. One is a junior who has small Div 1 offers to include Marshall, and one is a 6"5 sophomore who is a guard and will likely have pretty high Div 1 type offers before he's done and offers that are probably even more impressive than the current junior (McClung). McClung may win the AA state player of the year for this season. I just don't see any of 3 (Graham, Union, or Richlands) playing with them. Union has a fantastic team and is right there with Graham and Richlands and may be even a bit better than both of them. Gate City beat them by 13 and 14 points this year when they played twice.