The methodology via the study's link:

Google Trends data was collected for the search terms "am I gay", "am I lesbian", "am I trans", "how to come out", and "nonbinary" for all 50 U.S. states and D.C. from January, 2004 to May of 2023. Google's proprietary 100 point scoring system was used to represent each term's normalized search volume proportional to all other searches in the region or time period compared. In this system, 100 represents the highest popularity for the term, 50 represents half the popularity, and so on.

So I'm not sure the 1300% number means anything