Sunnyside will host the match that will decide Falkirk RFC’s season.
GHA top the division courtesy of a phenomenal bonus point advantage, but they visit second place Falkirk who have a superior win record - and a game in hand.
However Mark McKenzie’s team are at a disadvantage from the bonus points accrued by the Glasgow side.
President Alex McQuade said: “We’ve not had a game in a few weeks - the injuries have cleared but we’re lacking match practice.”
Falkirk were foiled for the third week in a row to get their game at Whitecraigs played in Newton Mearns.
This time it was the Sunnysiders who had to apply for the game to be postponed as SRU development officers Kris Burney and Andrew Simpson were needed at Murrayfield for the international with Italy.
“Whitecraigs are probably the form team in the league just now,” added Mr McQuade. “They had a bad spell of injuries and dropped off a little – and they’ll be a tough test for Cartha who are behind us.
“We have a full squad to choose from - and we’ve even had to leave players out of the pool because there is so much competition at the club just now.
“That shows how strong we are – we only had six or seven signed players in the summer.
“Saturday’s game will go a long way to defining our season.”
Kick off is 3 p.m.
Elsewhere Grangemouth Stags host Glenrothes at Glensburgh