Glofish regardless of how they came about are not supported by the hobby. They are, I believe, illegal in the UK and EU.
As others have noted, the "aggression" is due to there being too few of the species. However, the problem now is that adding more may not solve this. It takes some understanding of fish physiology, but once a fish reacts through increased aggression brought on by environmental factors that are not what the fish is programmed in its DNA to "expect," it is rarely reversible.
The best solution would be to return the Glofish to the store, or elsewhere.
As others have noted, the "aggression" is due to there being too few of the species. However, the problem now is that adding more may not solve this. It takes some understanding of fish physiology, but once a fish reacts through increased aggression brought on by environmental factors that are not what the fish is programmed in its DNA to "expect," it is rarely reversible.
The best solution would be to return the Glofish to the store, or elsewhere.