Thanos with the Power Gem -Versus- Wonder Woman and her Lasso
Thanos has the Power Gem, and is willing to use it to its fullest extent.
Wonder Woman has wrapped Thanos up with her golden lasso. Can Thanos break free?
There is no precedent for the lasso breaking in the past. However, if we rely on that alone, we fall prey to the no limits fallacy as I don't believe anyone has ever tried to break it at the Thanos+Power Gem level.
Simply put - there is no way to know whether he could or not.